@Suiseiseki

> I always disable DHCPv6.

You can disable the entire IPv6! Nothing bad happens.

> No, as that insecure method of loading up proprietary software is a bad idea.

"Proprietary"? I've never used PXE for anything besides Linux and Plan 9 (and it is way easier to get it to work in Plan 9).

It is also moderately absurd to call it insecure. "Oh, no, it booted the wrong thing because I allowed a man with a black hat and a handlebar moustache to plug strange machines into my network! This diskless machine is now compromised! I'll have to...I guess you just reboot it and it's fine."

> IPv6 just works nearly immediately,

In the sense that you can say you have an address, maybe. I wouldn't say that a networking protocol "works" until it can get the packets to the internet.

> sometimes IPv4 breaks,

This is making me question what you mean by "broken" or "working".