There's a huge support cost in providing self-host, together with an impact on image (ease of use, etc). With the tiny proportion of people who actually would self-host, I don't think it makes any business sense.

I want a self-host, and generally resist on any technology unless I can, but at the same time I don't expect any company looking to sell products to actually do it.

So self-host generally only goes hand-in-hand with non-commercial projects.