Wouldn't it be awesome? We would use it as an AP aswell. It would use something as small as 128MB, and when it hits some obstacle we could program it to say "get outta way b*ch" or something.
I saw something like that today, the robot cleaner hits something and it yells something that the user programmed it to.
Longer answer: If you're willing to put in the effort, maybe you could get it to work. I don't see how this would be useful, but if you want to spend that time...
I just saw this yesterday - not openwrt but people installing an app into their vacuum that allows it to run independently of cloud services https://lemmy.dbzer0.com/post/57494965