Electronics are mostly solid state and are therefore virtually wear-free.

If it’s designed well, they could actually be more reliable than pushing fluids through tubes. But pushing fluids through tubes is already pretty fucking reliable.

I think the main point is to eliminate rusting brake discs from EVs, which rely largely on regenerative braking anyway. I know mine are constantly crusty; like I can always hear them scraping for the first few hundred meters of driving. Which is prolly not great.