What's the feasibility these days of using AI assistanted software maintenance for drivers? Does this somewhat bridge the unsupported gap by doing it yourself or is this not really a valid approach?

I've found AI tools to be pretty awful for low level work. So much of it requires making small changes to poorly documented registers. AI is very good at confidently hallucinating what register value you should use, and often is wrong. There's often such a big develop -> test cycle in embedded, and AI really only solves a very small part of it.

That's just the new normal. Everyone is doing AI assisted work, but that doesn't mean the work goes away.

Someone still has to put in meaningful effort to get the AI to do it and ship it.