I'm pretty sure you would be quickly rate limited, especially if you participate in a few large group chats.

Would love to know if someone actually runs it reliably. Especially with a Workspace email address.

The whole purpose of using a distributed IM like Delta Chat is to break free from big data leeches like Google. If you're just using Delta Chat with a centralized Gmail server as the backend, doesn’t that defeat the point?

at one point that used to be how email worked too. for me the point of using deltachat is that it works with my existing service and that it does not depend on any particular company/service. issues with google are secondary. deltachat is still useful even with gmail.