I do and did this with all my previous phones. Unfortunately, it comes with so many obstacles nowadays like non-working banking apps, that I’m unsure how the future of custom roms looks like. If I need to buy a new phone, I’ll pick one with good custom rom support and a cheap second one just for the banking stuff.

I miss /r/opensuse and an active Java community. There are a few Java communities on several servers, but they are all basically dead.