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by dathinab 2204 days ago
> The problem is similar to the IPv6 transition,

Maybe similar but much smaller then IpV6 with much less problems, because most web frameworks will transparently support HTTP/1, HTTP/2 and HTTP/3 for the large majority of use-cases.

> Mail still flows to many places unencrypted

Mainly because getting a TLS certificate wasn't that easier for a lot of people in the world until recent years and the standard being written in a way which can be easily (mis-) understood as you having to have support unencrypted sending/receiving of mails. (It requires it for sending for local, i.e. implicitly by OS user account authenticated same machine mail.).