

Removable batteries aren’t going to happen. The extra mechanical parts needed to make it happen take up space that could be more battery. This isn’t a couple of AA batts, here; the voltage and weight mean everything has to be chonky.
Doubly so for a company like Slate that wants to keep things cheap. They need to pick existing parts off the shelf as much as possible. Removable EV battery parts don’t exist.
Brushless DC motors are the most efficient way to make an EV. The controllers on those require software. Battery charge balancing also needs software; it’s dangerous to just feed voltage to lipos.
You can’t have anything like a modern EV without software of some kind. You can make a glorified golf cart, but its range/efficiency would be shit.