I created a poll on the PinePhone forum to ask people which interface they were using. Not many people have voted so far, but Phosh appears to be the favorite interface on the PinePhone:
I just wanted to let the Phosh devs know that your work is bearing fruit.
I predicted in my article that Phosh would become the principal mobile Linux interface, and this is a good indication that it is already happening sooner than I thought it would.