My problem with these types of apps will always be that most software it interacts with will unfortunately be designed without accessibility in mind.
I've trialed a handful of these mouse-less programs before and I always run into the same hurdles.
E.g. where one or more of my apps have sliders which I can't interact with using clicks instead of drags (so I can't interact with it at all), or needing to click things like my MacOS dock, or even resize a window.