This is a really good take on the (still unsolved IMO) problem, though I suspect it only makes sense to people who have experienced all the issues personally, since so many of them are "it gets really awkward with big programs" type problems.

He did miss out a pretty significant flaw of message busses - the producers and consumers of messages are completely decoupled, which makes debugging really annoying because you don't have anything like a stack trace. You just know that your component received a message, and good luck trying to figure out where it was sent from and why.

That's also a big problem with magical reactivity systems like Vue. Your stack trace is pretty much "yeah something changed somewhere so we're updating this component. Don't try and figure it out."