@freemo
We still need at least the same amount of computations if not more when working with coils. Especially if trying to achieve smooth movements. We also need something to manage high currents on such a large scale. Let's say, we won't be considering fully paralleled operation of all coils at the same time. But we still need to be able to power at least ~8 coils at the same time.

Main challenge from my PoV is potential magnetic interference which can reduce the efficiency of each coil. But it's a task for some physics modeling, not just sudden brainstorm in Mastodon comments.