This issue is going to be range and cost, the Hummer is not going to be an efficient platform, no attempt at aerodynamics at all, so it's going to take a lot of battery pack which will increase the cost.
A large percentage of the public don't care about the efficiency of their vehicles unless they have to. The oil crisis of the 1970s caught a large number of Americans flat footed because few thought anything of energy efficiency before that. Gas had been so cheap for so long and there had been no shortages since the 1940s (due to war rationing) that it was an out of sight, out of mind issue in the US. In Europe and Japan where fuel was more heavily taxed fuel efficiency was a concern and Japanese auto makers saw it as an opening and took it.
Fuel efficiency awareness has not declined back to 1970 levels since, but a lot of Americans have become lazy about it. A friend of my partner just dropped $115K on a Dodge truck that gets 12 MPG and has 700 HP. It's a limited edition and he thinks it will hold its value. Who knows what collectors will think in 10 years, but if there are trucks out there with 1000 HP with 200-300 miles range, it might not be worth much.
The large family sedan has died off in the US to be replaced by SUVs and trucks that get even worse fuel mileage. At the same time a different segment of the market were buying Priuses (Prii?) and then 1st and 2nd gen EVs because they were concerned about efficiency. So we've seen a bifurcation of the market.
A friend who lives in the inner SE in Portland (very trendy neighborhood with a lot of eco-hippies) has noted how vehicles change when she leaves the city. In her neighborhood there are some electric cars (home charging is difficult there), lots of hybrids, and small econo-ICE. She gets to the next county which is more suburbia and half the vehicles are full sized trucks or SUVs built on truck chassis. She notices because she can see around quite well in her husband's Prius near home, but her visibility goes to zero and all she can see are tailgates saying "Ford" when she gets out here.
This area is split too. Half the vehicles are trucks, but a large percentage of the rest are electric cars. A lot of people living in this county commute to Portland and electricity rates here are $0.08/KWH, so a lot of the commuters went electric. I went to the market yesterday (it was a Whole Foods-like place), and I counted 5 Teslas in the sparsely populated parking lot on my way in.
The electric Hummer is not being sold to the half of the market who care about efficiency. It's the gateway drug for the testosterone crowd who want macho vehicles and don't care about fueling it. Tesla already put a crack in this market with the high performance of the Model S. GM is trying to get the jump on Tesla furthering that crack with the Cybertruck by bringing out a high performance EV truck that looks more like a traditional truck. The Cybertruck is too weird looking for many buyers.
The obvious difference being (for the wilderness) - you can fill up some gas cans and take them with you into the wilderness and refuel your ICEV for the return trip. That's not available with a BEV.
It is obviously a small corner case but the brilliance of Musk (or at least one of them) is design / build / sell what people want, and not what somebody tells them is good enough.
That is a use scenario that means ICE will never completely go away.
My father was a professional photographer for around 60 years (he retired age 85). He passed last year at 100 and I've been tasked with dealing with the stuff my parents left behind. As I worked on valuing his equipment I found a small but thriving world of film photography. You can still buy new rolls of film for $15 a roll, and processing costs about the same. There is even a strong EBay trade in old expired film.
This drove me to research why. It's the same sort of phenomenon that has revived vinyl as a niche market in the music business. The analog nature of film has properties that just can't be reproduced with digital cameras no matter how sophisticated the image processing in the camera. For 90% of the world the camera on their cell phone is more than enough. Another 9.9% get what they want with some form of dedicated digital camera, but for the small sliver of the market who want something digital can't provide, they want to shoot film the old fashioned way.
Similarly, there are some edge cases where gasoline/diesel fueled vehicles are going to still be needed because there are places where you just can't put an electric charging station. There will be very, very few people who really need this sort of thing, and it may be uneconomical for anyone to make ICE for these purposes so the ICE crowd will use last gen ICE and keep them going.
Nikon just discontinued their last film camera about a year ago. They had one professional model still in production all this time to meet the needs of the film niche. Kodak also still makes film, but just a fraction of what they used to make. Many of Tesla's Gigafactory 2 employees in New York making solar panels are former Kodak employees. Kodak hired blind people to make film because they could work in total darkness with no problems. Similarly solar panels are made in the dark too. Solar City put their big factory there to use the employee base left out of work by Kodak's downsizing.
