You need to shoot some of the challenges in the AR threads. for long range just under 1 MOA doesn't really say much at least to me.
But for most purposes these days its more than enough.
I'm not saying lots of cleaning is needed though.
Over many years of competitive shooting, and I"m guessing not all that many folks shoot or shot 10-20K rounds a year, the barrels we didn't break in were harder to clean and needed cleaning more often. Accuracy was pretty typical though for the most part, not a lot of difference that I could tell, though I felt that the barrels we broke in often shot rounder groups. They certainly cleaned easier. And tended to be taken to a longer life.
And for the minor work involved in breaking in a tube, vs the cost, its just to easy to do some form of break in.
That's as big a waste time, effort, and bullets as barrel cleaning is.
