I wish FreeBSD would follow suit. They dropped BIND in favor of Unbound for 10.0-RELEASE, so the precedent is there. Sendmail wouldn't be so bad if it weren't so damned arcane and broken. Like, something as simple as getting TLS to work with older Exchange servers is impossible. Forums are filled with people complaining about this problem for the last ten years. It's so frustrating, especially when the workaround in other mailers is so simple (e.g., Postfix, where one can force TLSv1 in the SMTP client TLS policy map).