That like OPs post is also a mixed bag. The high repair costs are largely because of EV manufactures trying out new things, like unibodies that are very expensi

That like OPs post is also a mixed bag. The high repair costs are largely because of EV manufactures trying out new things, like unibodies that are very expensive to replace, lack of 3rd party mechanics trained on them, and less commonly available parts at auto stores as you mention. The great news is that none of these are inherent with EVs, the traditional manufactures are using more construction in common with their ICE counter-parts and mechanics and parts will become available with time as the market adopts it. The other bonus is that EVs need a lot less maintenance to begin with because they are mechanically much simpler and regenerative breaking does a lot to cut back on wear and tear on the parts that do experience more issues like tires and brakes.