Okay, so it has been about a week with my Pro1.
Software
I decided to go with LineageOS, because it seems that it will be updated more frequently. LineageOS on the Pro1 works perfect, no unexpected shutdowns or crashes. Using keyboard shortcuts and arrow keys to scroll (especially with the modifier to scroll to top/bottom or ctrl-tab to switch tabs) in Chrome just feels so right. I am waiting for the Vimium Firefox extension to be compatible with Android to enjoy browsing with vim mapping.
I use most applications in the Terminal (Termux), for example vim for coding or aerc to e