I would love to give Haiku a try. Indeed, I've looked at it's code before (it's quite good, or was, last time I looked at it). What prevents me is accessibility. To be fair to Haiku, implementing an actually good accessibility stack is genuinely a nightmare that AI isn't going to help much with, were you to ask it to help you with it. Primarily because many accessibility stacks (UIA, MSAA, IAccessible2, AT-SPI, ...) are massive collections of incredibly nasty hacks. I have yet to find an accessibility stack that is actually well-designed, thought out and future-proof. And screen readers are pretty much collections of good code alongside a bunch of app-specific workaround as well which just complicates things.

All of that said, I might fire it up if only to play with it from the console if I can get something like SSH working.