[tialaramex]

Without SNI the only way for a client to talk to this.example rather than that.example over TLS and thus HTTPS is to give this.example and that.example different IP addresses. There aren't enough addresses to plausibly do this in IPv4, but in IPv6 there are plenty (except in some unusual corner cases)

[bogomipz]

Indeed and I remember the bad old days of burning /24s for IP based virtual hosts in order to provide TLS. our current IPv4 exhaustion was the part I was missing. Cheers.