The term fanboys comes up a lot and no doubt there is truth in the concept but remember that door swings both ways. There are plenty of fanboys that bash higher quality just because they didn't do their research before buying, or trusted someone else's opinion without putting forth some effort of their own.
Years ago there wasn't the selection we have today so certain familiar brands made sense then but it's foolish today not to look at lesser known brands like PSA and Spikes when you get so much more for the money. (That's not saying all new brands are better, there's plenty of lower quality stuff out there, you have to look for the gems.)
Anyway, DPMS/Bushmaster, etc. made sense years ago but anyone buying today should look at the wider field. Why reward companies that give less at the same price point?