The great thing about brewing: There's no "wrong" way to do it.
The awful thing about brewing: There's no "wrong" way to do it.
Do people use 30min additions to make good beer? Sure. There are lots of ways to make good beer. Is the beer good because of the 30min hop addition? I doubt it. In a blind tasting between a beer with a 30min and a 20min hop addition, all other things equal, I doubt most people could tell the difference.
I think you should pick a method that works for you and stick to it so you can get consistent results.
+1 here. The only thing I would add is the 30 minute hop addition makes it different
than the 20 minute, 10 minute, whirlpool, etc.. How do you know whether you like it or not until you try it? Brew the same APA with a 30 minute instead of a 10 minute addition and compare them side by side. That's the great part of this hobby for me, the experimentation.