Do you usually work at home in an office or in different places? (Cafe, Office, Home, …etc)
This is the current layout, mostly at home, but considering doing away with having the laptop available and clam-shelling it because I honestly just use the studio display

If you prefer the huge screen and don’t mind the extra weight for the bag, go for the 16. If you are looking for a more portable option, definitely 14. For me, I prefer the 14, cuz when I go out I tend to walk a lot, so I don’t want the extra weight on my back.
Literally just got the MBP 14” yesterday. The screen feels huge just compared to my old 13”. That being said, I’m probably going to get a monitor for when I’m working at my desk & not in a cafe.
I got myself a 14” after having a 16” at work. I loved the large screen, but the extra weight made it a pain to pack at times.
I’d recommend going for 14 inch if you work with an external monitor, but if you don’t then go for a 16 inch.(personally I ditched my 5k monitor in favor of the 16 inch laptop)