Their users are suffering because of phishing. Measurably. And as to "sufficient warning," sure, I can see that it would be nice to have given people like you

Their users are suffering because of phishing. Measurably. And as to "sufficient warning," sure, I can see that it would be nice to have given people like you more lead time. But then again, "GMail has always supported encryption in transit using TLS," and if you care about running your own email server, it feels to me like the writing has been on the wall for that one for a long time.