> With RIRs running out of addresses, that's about to change

I doubt it. Websites that want to be reachable will find a way to be reachable.

> As techs, I think it's our responsibility to push this forward and keep the Internet free and decentralized

I agree, but there is only so much I'm willing to sacrifice for that effort. I've tried to use v6 for at least two weeks on three separate occasions. I do that about once a year. That's the level of sacrifice I'm willing to make for this effort.

My hope is that one year it goes so smoothly I forget to switch back.

For web servers it will be CGNAT in reverse. One overloaded IPv4 load balancer trying to keep up with too many servers behind it. But you'll be able to use its IPv6 address directly.