This thread is epic. Kept me warm during the cold winter months, while I was on A&A where I had native v6. Finally yielded to temptation (and speeds) and came back to VM because I was sick and tired of being stuck in the slow lane on 80/20 FTTC and VM were the only other option. My dad's place isn't too far from here and I get nearly double that on LTE when I'm visiting. It was too much.
But I do miss IPv6. That peer-to-peer-ness is painfully absent at first blush on v4. I'm looking into Zerotier and Tailscale as ways of trying to restore it, but it's not IPv6, of course. I'm not too keen on the idea of using HE tunnels because of the effects they have on geolocation detection.
I'm not sure I'd cry over the loss of a public v4 address if DS-lite were deployed; we probably ought to be prepared for the arrival of CG-NAT anyway. Yes, it means you need a VPS to let in v4 traffic on a public port--not ideal, but possible, especially with tools like FRP. And Tailscale/Zerotier are well-suited for CG-NAT situations as they reach out to do the mesh VPN/UDP hole-punch thing. I'm more bothered that I have the Hub4, and so can't actually benefit from all my downstream bandwidth in modem mode.
Here's to hoping for progress--any progress at all--on IPv6 on VM!