The sheer amount of times Airdrop has been the "best" way to share files takes away from your point a bit.

It's almost always faster than anything else available, and ipv6 would make that method of sending files closer to the default for most people.

Having VOIP in games or 1v1 lobbies is, in the strictest sense, "hosting" something in the same way.

FD: I work in video games so I speak from this bias.