it's nice that everything is integrated into one system! I have always been searching for similar solutions. But one thing that bothers me email. If I use an email provider from Google workspace or Microsoft365, then sooner or later I was forced to use their calendar, and soon docs because the preview and integration.
The closest I found is larksuite[0] which they recently added email hosting. But I am still paying microsoft so I haven't switched email. I just use lark's IM as email client as well.
While I am trying the product, I am curious what's your thought about add email hosting.