I like to use i3 in a desktop environment so I don't have to reinvent the wheel of sundry support details like hotkeys and monitor behavior, automounting USB drives.
I've used gnome flashback with i3, just like regolith, and decided to try using regolith to get the full curated environment but I found their obfuscation of what's going on impossible to deal with. Just working out how to change configuration was a huge pain in the ass and had to be done the regolith way.
But every new OS release with a new version of flashback etc. doesn't seem to work right, so I am contemplating giving up and just going direct window manager and accumulating all those sundry details of a DE manually.