I have been playing in front of a lot of people for many years (contemporary worship-rock, ballad, all kinds of styles). Guess what ? I played them all in the key of C - ALL of them and use the transpose functions for every song. It works great ! Use the technology.

I am able to concentrate my efforts to learning the chops, styles, chords, etc. A lot more fun and enjoyable rather than going thru the drudgery and often fingering mistakes playing in different keys. I can even change keys smoothly albeit using fast fingers to do that.