Ubuntu Budgie looks nice, thanks for mentioning it - I'll try it sometime.

An old Macbook with an Ubuntu variant is a nice combination of sturdy hardware, light(er)-weight operating system, and well-designed user interface. In a way, it feels more like the spirit of "Macintosh". And it would make for a good educational/toy computer for children and young people. If I see an opportunity, like family or friends who have old laptops or computers, I'm going to offer to set it up for them.