I'm halfway there with Communick. I started with the focus on providing hosting for social media and messaging platforms, so I had to find my way around setting up LDAP for SSO, provisioning of object storage for separate services, etc.

But the most interest thing is that in the process I also wanted to remove my dependency on the other centralized SaaS, so I ended up setting up my own git repository (gitea), my own CI (woodpecker), my own project management tool (Taiga), my own knowledge-base/data sharing tool (Baserow).

On the one hand, I agree with you and think it could be a great business opportunity. On the other, the whole thing is so easy to be completely commoditized that I don't see a practical path to profitability. If I go to investors with the idea, they will say (rightly so) that there is no easy way to establish a competitive advantage. If I bootstrap (like I have been doing with Communick) I can not be fast enough to do both customer acquisitation and development.