Chevy is putting together an electric conversion kit:
https://arstechnica.com/cars/2020/10/chevrolet-readies-an-el...I think solutions like this will be best for the near future for folks who want a car with an electric motor, rather than a cell phone you can rent to drive places.
It seems like every manufacturer is generally going higher and higher grade on feature set and (some) performance metrics, and saying "screw you" basically to maintenance, repairability and general comprehensibility concerns.
The cars I've owned from the 60's up through the 90's all had wiring diagrams that would fit on a few pages and could be maintained, largely, with a handful of tools in a normal suburban driveway. Newer cars seem more and more to require specialized tools or equipment and are harder to debug.
Generally the maintenance / repair process is aimed at shops and professionals, not the end user. This specialization is brittle, and unlikely to survive any significant systemic shocks. We've been locking ourselves into this model for decades, and I don't see an easy way out.
I look forward to some high quality open source EV hardware becoming available eventually. That's probably when I'll get an electric car.