IMO tech industries are relatively easy to disrupt automotive is at the other end of the scale, very difficult..
Apple or Google could buy GM or Ford cheap in a fire sale, they then need 5-10 years to bring the EV side of the business up to scale and get to where Tesla is now.
Others like VW Group, the Chinese, Nissan, Hyundai and Daimler are further down the track, with a track record of making EVs, advanced plans and car industry experience. This group can compete with Tesla in 2-3 years time...
Google and Apple are at least 5 years away from competing... sure they can do the tech side, and get a car company to make the shell, but what about batteries, motors, fast charging, service, components, sales and distribution... If they inherit a dealer network that is more of a hindrance than a help.. And if they shut down the ICE lines, that is a lot of redundancies...
Even if they partner a car maker, they need that car maker to remain viable....
On the other hand Tesla could be making smart phones with ,with an app store in 2-3 years, there is at least one Chinese company that would love to partner them. Smart phones, apps and app stores are way easier than cars..