isn't it simple. if you do not know if you need RTG answer is easy: NOPE
the number of games that uses RTG can be counted on the fingers on one hand.
Workbench is for sure MUCH nicer to work with, among with texteditors etc etc.
I do all my coding using a RTG screenmode as I want much text on the screen. (but will soon go over to crosscompiling)
RTG is a thing that is VERY nice for me. and have been a must for me since I had my Amiga as main machine (before RTG I used my A2024 monitor giving 1024x1024 resolution native)
but today? well it is nice and pretty..
so I will have 2 amiga 1200: one with my Warp1260 and RTG. one A1200 with my TF1260 that is my demo-party machine.
and my AA3000+ with ZZ9000. so RTG on all machines except one..