Are you refering to the nylon or muslin? I use a nice-sized nylon bag for my specialty grains because it's reusable and keeps more of the little husks out of my wort. I usually use the little muslin socks for hops because it seems to let it get all the goodies out and the nylon seems to not let the hops get good and soaked.
Did that come close to what you wanted to know? As for how the "die-hards" feel about it, who cares? Of the many hobbies I've tried over the years, homebrewing is one of the most personalized. Sure, the concept is generally the same but there are a lot of options open to how you feel you want to do it. Have fun.