[whpalmer4]

It was never state of the art!

Mailing an action directly into your database requires that either you have a machine running all the time to handle incoming mail, or you have a copy of your database on an Omni server, and they have a machine running all the time. The latter means that they need to effectively run a subset of OmniFocus for thousands of clients, and it is possible that they haven't figured out an efficient, robust manner to do so. Also requires setting up some infrastructure to give everyone their own private email address to which they can mail their actions. Certainly nothing impossible, but something you want done right so that it can be trusted.