I don't understand Google here. Clearly Gmail is not the final word about email user interface, and Inbox was a very promising first step. I can understand, if

I don't understand Google here. Clearly Gmail is not the final word about email user interface, and Inbox was a very promising first step. I can understand, if Inbox did not receive enough attention, to start moving Inbox to different directions, but how is it possible that Google has no space for a permanent alternative UI testing project?