Also, for every sufficiently successful multi-language ecosystem, there will be people trying to get it to support one more language.
But if you don’t care about using them, maybe it’s not that compelling.
I think they are referring to the Flet app shell that is the native shim for Flutter and Python.
I wonder if we really did a good thing by building this "app culture" where everything needs a little "app" as a way of extracting a little more money from people. Although "app" means application, the word "app" is apt because it signifies the commercialization of applications into advertisements-as-a-program, in the same way that YouTube transformed videos into advertisements-as-a-video.
What a mess.