And because SRV records are not used for the web, they can't be used at all, as some routers or something doesn't support them and instead discards them. (~10% of users according to the admin of yaxim.org)

And then along comes https://datatracker.ietf.org/doc/draft-ietf-dnsop-svcb-https... defining a "SRV2", SVCB and also its identical twin the HTTPS RR (same format, different RR number). I have a fear that those routers will end up supporting the HTTPS RR but not SVCB...