It’s sad because it looks interesting from the description!
I don’t know about other people, but in my list of my “contacts” in, for example, Skype there only people who “I know” + family members + relatives. I have never written and do not plan to write from a deltachat to “strangers” I do not know. It is (at the very least) not polite, in my opinion.
So I don’t need “normal network” - deltachat it is literally text chat (for me) between me and my friends and relatives.
That is, if I would have my “own server” of deltachat and I want to switch to “only my server” instead of some messenger(just for example - Skype) i’m sure 90% of my “contact list” will go to “my server”. And I am sure that neither I nor they need “the whole network” - we all need at best - 20 people - no more.
And it seems to me that those who are trying to use deltachat for conversations in the “organizations” for work between employees - the same - they would also like “their own personal server”
on top of that the deltachat supports “multiple accounts” Multi accounts/profiles support - that is to keep another account (for “personal server” 
) - not a problem - but “another account” is on a “personal server”
p.s.
Especially if it would take 1 minute to register there (try to register on “some” open server in xmpp network - There you have to just specified a username and password and no settings or anything else at all! - just “two words”, that’s all - “i want” the same thing-)
That’s exactly “about it” was my first post.
Deltachat “personal server” supposed to be simple.
Have a ton of “cryptography” under the hood- which will not be visible to the “ordinary user” exactly like they have briar / Briar Mailbox · GitLab .
Work on “any” equipment.
And accessible - to everyone.
If they briar / Briar Mailbox · GitLab can it’s quite possible - “it is” also possible also in deltachat