This sounds a lot like "These newfangled automobiles are scaring the horses!" The situation feels like chicken-and-egg to me. If I had the option to use IPv6

This sounds a lot like "These newfangled automobiles are scaring the horses!" The situation feels like chicken-and-egg to me. If I had the option to use IPv6 at home, I'd be on it 100%... as-is, there's little motivation to move off of v4 internally since I'd have to NAT/tunnel to get to the v6 internet over Fios. That said, most of my link-local intranet traffic is on the fe80:: network, because that's what avahi and mDNS prefer as answers.