I would really like to update but I want to know if they ever got full screen gestures working (like swipe up from the bottom to go home or open the recent apps, or swipe from either side of the phone to go back) WITHOUT having to use the default launcher. And I would like to be able to use TWRP with a PIN but if it can still by bypassed by disabling your PIN temporarily I guess that's fine...
I'm still on android 10 and I'll stay on it until full screen gestures are fully working with 3rd party launchers. If that means I never update again then I guess that's how it'll be.
I agree with these annoyances. I use Nova Launcher and to get full screen gestures working I have installed 'Fluid Navigation Gestures' https://play.google.com/store/apps/details?id=com.fb.fluid&hl=en_GB&gl=US
which does the job. (remember to exlcude this app from battery optimisations, and allow it to 're-start')
I would advise keeping the navigation buttons on though, even if you do not use them, for those relatively rare times the app does not start properly.