ventrogluteal is by far the least painful muscle to pin, virgin muscle or otherwise. most people just don't know about it so they don't use it. people who pin twice a week, once they find and hit the ventroglute effectively, NEVER go back to shooting dorsoglute.
some of the benefits:
1. much more accessible location
2. huge muscle, a couple of muscle overlapping in fact, very deep
3. not a lot of veins, no chance at hitting a major nerve.
4. doesn't interfere with leg day
5. little to no pip even for virgin muscle and using things like prop and tren
6. need i say more?
downsides:
they don't exist.