@mango
Divide into groups based on needs is a good idea. Assign a rank # to all you mentioned.
My version of list starts with:
Group 1: need voice calls - with VoLTE (required in some countries now, and many more in future). USABLE on 4 or 5 phones as of today ? Have not tried it enough to say 'mainstream ready' or not.
Group 1a: Voice calls over Wifi (Rural areas, etc). Hope you don't need it. NOT supported by UT.
Group 1b: VOIP to PSTN. Please tell me how to set this up (see 1a, above)
other groups ? Your list...
BTW: Libre office snap installs directly - no need for Libertine.
Use wireless external display direct to TV (IF TV supports Miracast. Many LG TV's do). Limit 1080P, even on a 4K TV, due to Wifi speeds, or something.
Wired external display would be nicer, but it seems NOT many older phones that UT currently runs on support it.
(if Oneplus 8 gets UT port, I think it supports wired ext display).
Wired keyboard & mouse through USB-C expansion adapter with PD charging (Acasis $10) operational.