The main problem I had when I was an EFI-noob was I really had no idea when good enough was good enough.

Getting the tune close enough to run decently and safely took a lot of time. And even then I was constantly questioning (and tinkering) whether it was ok or if it needed to be tweaked to be better.

Going to a carb on the next build was almost a relief because that is what I was comfortable with. It was easier to just say it was "good enough" and focus on other things instead of obsessing over how much to increase the cold start enrichment or whatever.