If our softwares were optimized, and if the web wasn't bloated, we could have dirt cheap computers. People already do a lot with RPi Pico.
I think the biggest problem is web. With an RP2040 you can do #gopher, #gemini, #email, #paint and #wordprocessing to say the least. A computer based on this could be very useful for schools. I am being tempted to do a startup or try getting a grant.