I've never seen a post on here of someone going the other way and switching to a carb from EFI if that tells you anything.
I was being serious, if there were guys that quit trying to make EFI work I don't remember them. My #1 rule in life is , you have to be smarter than what you are working on. The quitters should have got more help and not given up.(Now, you know this isn't true, especially in all the time you've been on here.) I'd definitely say the "majority" of those posts are folks switching TO fuel injection, but I've seen probably 10+ racers who got frustrated and went (back) to their blow-thru carb'.