Tesla already built a Model S with a swappable battery packs, plus a robot that could swap them in 90 seconds: https://www.youtube.com/watch?v=Oj6LaYFall4

They have given up on that, and there are certainly some problems with the model (for example, what if you own the battery, and they replace it with one in poorer condition?), but other companies are still pursuing it: https://electrek.co/2018/11/01/nio-battery-swap-station-next...