Well, you can call me dense if you like, but that second paragraph neither confirms nor denies that the current way of installing applications would be going the way of the dodo. What @philm wrote in that second paragraph talks of the base system and the desktop environment only.
Also, your own wording as quoted above suggests that those who prefer the current maintenance model would have to switch from the Stable branch to the Testing branch, which I also don't find particularly reassuring. So now we already have two unclear statements to muddle the waters instead of one.
Manjaro as it currently exists is an excellent distribution that offers something for everyone's tastes. However, if the course of the entire distribution is going to shift away from what Manjaro is currently offering, then I'm afraid I ─ and many others with me ─ will be looking for another distribution that offers what Manjaro is currently offering but is planning to do away with in order to become a rolling-release version of Ubuntu. (This is not a threat, by the way. It is however something to seriously consider.)
There's a reason why we chose Manjaro in the first place. Please don't take away that reason. Because if you do, then yes, you'll be winning a lot of former Windows users, but at the same time, you'll be driving away your more seasoned GNU/Linux users.
When @philm made the announcement of the Manjaro GmbH, many users already left in anger without asking questions, while others ─ myself included ─ stood up for @philm and defended his decision, exactly because promises were made that the interests of the GmbH would not influence the development of the distribution.
If those promises have now suddenly become an illusion, then please let us, the community, know now.