Given that, by definition, the majority of end users are on “Big Email”, if all of them adopt it, it will already have vastly more practical benefits than DANE

Given that, by definition, the majority of end users are on “Big Email”, if all of them adopt it, it will already have vastly more practical benefits than DANE has had thus far. That said, I’ve looked around a bit and it doesn’t seem like it’s actually impractical to set up MTA-STS for your own server, unless I’m missing something? (For reference, I’ve been skimming https://roll.urown.net/server/mail/mta-sts.html https://roll.urown.net/server/mail/mta-sts.html ). Can you elaborate on why it’s not practical for small players?