I'm mentioning the following as a matter of interest...
It looks like TheBrain has some direct competition. I recently came across this app on Windows store which is surprisingly similar to TheBrain: InfoRapid KnowledgeBase Builder (http://www.buildyourmap.com/) with online and offline versions etc.
The software has similar functionality as well as some which would be useful to see in TheBrain (e.g: Insert Pseudocode).
There is a lot of research being done to look at mapping relationships in some form or another which TheBrain is a leader in (in my view).
I'm thinking the decider will be when TheBrain gets its API or some way of providing some way to easily provide automation to update en masse will definitely set it apart from anything else.
This is clearly easier said than done, given the request for API has been about for many years, I hope the V9 updates will provide the team with the benefits to make this essential update.