If Google would announce that Chrome is dropping IPv4 support in n months, that would probably get things moving. ;)
For example the last time I had an IPv6-only host I had issues cloning things from github, as "git clone git@github.com..." failed due to github.com not having IPv6 records.
A quick search revealed this open 3+ year old discussion - https://github.com/orgs/community/discussions/10539
(Ideally your ISP would be running NAT64 for you, especially if it's a VPS provider only giving you v6, but for whatever reason few of them do...)