A unix like os with user interface from the windows 2000 era that he could use as his daily driver at some point (instead of Linux). He said as much in some podcast I can't remember (probably cppcast).
No. He said it was occupational therapy. The goal was relaxed coding, not achieving anything at all.
I think it was meant to be a recovery project first, hobby second, community third. Then ladybird started showing more potential so his focus shifted there.
Sorry if I don't understand what you meant to ask.