I've used Capture One Pro for a similar amount of time and anything else (LR included) feels like a step down. Probably mostly inertia and familiarity by this point.
Yeah, my goal is to be able to run my next photo software natively on a linux box, and to my knowledge Capture One is only available on MacOS and Windows. It does look like great software, though.
I’ve tried Dark Table, but I’m afraid you may be correct. Trying to switch after 7 yrs of LR feels really challenging.