They were really helpful when it came to me setting up a pig zombie grinder. First they helped me find a location in the nether to hook my overworld nether portal to, since it was hooked up to someone else's. But after a small discussion, Eta informed me that you didn't need a portal in the nether for it. They just spawn from the portals themselves. Never knew, lol. Wouldn't doubt Eta got a bit of a chuckle from that.