If you stop trying to find something like truly ontologically novel about it, you might be able to understand what it actually is. Okay it's not impressive. It's not incredible. It's not groundbreaking new technology. It is what it is.
Essentially, as I understand it, it is a personal AI assistant running on your computer, integrated with different systems (like email, chat).
99% of the general AI utilizing public has no desire to build and maintain what you’re doing.
The answer seems to be simply that it is all of the extant technologies productized for normies, a la Dropbox. Satisfactory answer, got what I was looking for, thank you! As a dropbox user, I may buy a mac mini and try it :-)