[megadal]

I could be wrong but I think a good way to have an edge is pricing. Email is generally a low bandwidth service with lots of cold storage, yet for most personal email services the price doesn't seem to reflect this.

Like for example Google One is $2/100GB and $10 for 2TB yet you can definitely get storage much cheaper than this, and bandwidth is close to, if not free on bare metal clouds.

I've been considering this myself. That or some IRCv3 offering.

If you go the commercial route you'll almost certainly end up building an ERP/CRM, as it's what a lot of companies seem want: a personalized ERP/CRM (not sure why, though it does kind of feels like just outsourcing an IT dept whenever this has come up in the past)