A +1 for older 1+ devices. I have a 9 and unlocking and rooting was simple. I also have a 10 that I recently acquired and it looks like things got more sketchy, e.g. I’m not sure quite how risky this is. Like you, I cannot settle for stock, and I find myself in the similar situation of picking my next phone based primarily off of user freedom and only secondarily based on specs.
My wife balked when I bought a Ducky keyboard to replace the solar UN-powered, Bluetooth DIS-connected, keys popping everywhere garbage I got from work. Once she typed on it, she never had another complaint.