Wow! I didn't realize there was so much passion when it comes to tumbling media. Lol.
So I guess that I should clarify...
I reload and shoot about 50,000 rounds year. I take friends and family shooting all the time, spreading the joy.
I reload for speed. I am not looking for the most accurate round, the prettiest or shiniest round, and I'm not picky. I just want my presses to work, I want as few jams as possible, and I want to do very little work when it comes to reloading.
I work 60-80 hours a week, and I have no desire to throughly and individually examine 10,000 pieces of brass. If reloading becomes work, I'd rather just buy pallets of 9mm, 223, and 308.
I have 1050s for each major caliber I shoot. I tumble the brass, spin the brass to get rid of the media, dump in the brass, dump in the bullets, feed the primers, push a button, watch the press, gather the ammo.
In this process, some amount of walnut media is always left over in the cases, and since its inflexible, it will gunk up the press. With corn, I have none of these problems.
There are many ways to reload, but that's just the way I reload.