[nkurz]

Changing from a simple "most recently used" approach to a complex machine learning approach doesn't seem like a a good idea. Perhaps there would be some other small modifications that would keep the system simple and deterministic?

For example, he mentions the problem that one gets into once one switches accidentally to the wrong app: once you've switched, it becomes the MRU when you try to switch back. Perhaps a rule that an application isn't added considered the MRU unless you interact with it in some way? So that if you switch to it but immediately switch away it is no different than hovering?