I've never made a completely undrinkable beer.
But I did make a cream ale where I tried to use powdered enzyme in place of barley to convert rice and corn. It didn't really work and it basically tastes really watered down, but it's kind of refreshing in a way.
I just got stuff for BIAB, haven't tried it yet.
But my personal reasons are that I want to do some adjunct recipes that require a mash, but I don't want to buy or store any additional equipment. So I'm guessing it will suit me just fine.
It's not a baby step... I don't plan on getting any...