Good answers here, I’ll just add one point.
It isn’t that Roon is uninterested in mobile usage.
We have discussed this at length (I have argued it at length).
What I hear is that Roon broke new ground on a lot of fronts, this took a lot of engineering, if they had tried to incorporate mobile in the plans they wouldn’t have succeeded.
They are now working on a mobile solution, but doing that while maintainability no their strengths is harder than it might seem.