* It was easy. I don't know what to add except it was easy.
* It is fast. I now consider Mojave bloatware, although I didn't know it at the time. It appears that there are now so many things running in Mojave that my old macbook could not handle it. With Ubuntu 19.04 it is FAST. And what can you say? Except imagine what 19.10 would be like on a faster CPU. Not that I need it, but ...
* Its fun. Probably this is a function of how fast it is, but also most things just work very nicely. I'm fond of 19.10 in a way that I have not been fond of my macbook since maybe Sierra.
* I miss Apple-C and Apple-V for cut and paste and I miss iterm2, but that is all.
* The only thing I need a mac for is ios development and for that I plan to get a mac mini, but otherwise the run from an Apple II, through a Mac SE and an iMac has ended for me.
* Oh, and you can run wine and windows stuff really easily on 19.10.