I have two 8 year old PCs running Vista that still work great. I have one six year old and two five year old iPads that are barely usable for surfing the internet. And they have been that way for a while now. Lets keep Apple far away from Tesla, please. Apple quit supporting my iPad 1 at iOS 5.1.1, less than two years after I bought it.
iPad 1 was a pretty unusual case. I have an iPhone 4S in regular use since 10/2011 (now in its 5th year of service), and it just got its last software update a month ago. This illustrates, unfortunately, part of the reason you should never buy first-generation Apple products. I think the point was that this is a lot longer than competitors in the wireless space, where a year, maybe two, is the norm. Google officially commits to 2 years now on its own devices, so that's an improvement.
That's a different situation from the desktop, and so it is for cars.
Though, I will say, Tesla may already be on this path. For example: my parking sensors, which I mentioned upthread. They routinely fail to work, and the SC has observed them malfunctioning in the past, but there's nothing they can do because they're discontinued. They're throwing some kind of error code they haven't seen, and they're not linked to the car's network so the codes have to be pulled from the car manually and in person. That was in 2014, less than a year after I bought the car: "Sorry, this thing you paid for doesn't work reliably and probably won't ever work reliably because we don't support it any more." They tried several times to fix them, but no luck, and it's not like I got a refund for the cost of that option or anything. Last time I asked about them they told me to check back in a year and see if there were any fixes.
I don't see that happening to anyone else, so I hope we're good. When paired with the other lack of interest in fixing "Classic" stuff, though, I'm a little concerned.