There is IntelliJ and Visual Studio. IntelliJ is successful, yes, but they have a long history, and the editor is really good. Visual Studio is maybe also successful but I'm not sure how profitable it really was or is.
But otherwise? Sublime Text and others were maybe successful at some point but not sure how profitable they really were. If you count the amount of development which went into it vs the revenue.
For me as a user, I'm extremely hesitant to use any non-open source editor. An editor is a long-term investment. I would not touch this Zas editor unless maybe in 5 to 10 years when it is widely used by many people or when it has become open source but otherwise not. Yes, it looks nice from a first glance but that is by far not enough.
My personal only exception is IntelliJ because it is so good. PyCharm specifically, although I have used other IntelliJ products in the past, starting with the original Java editor, 15 years ago or so, which was heavily praised by some friends.
But otherwise, I want to be able to extend the editor easily, also its core itself. I want to be able to support it when the original developer stopped working on it. Or port it to other systems the developer does not care about. Or do some changes the developer disagrees with. Etc. I want to be sure that it is in principle possible to run this in the next 10-20 years. Or not only me. The nice thing with open source is that many people think likewise, and then there will also be others doing such effort, like supporting it on recent systems, adding features, fixing bugs, etc. So then it is a community effort.