Very glad to see Clutter continuing; like many others, I want to keep it around because it works so well and it works on every device. Hopefully we will keep Clutter for an extended period, and when we're forced at some point to move on, can I suggest allowing users to choose whether Focused Inbox filters a single inbox or sweeps irrelevant emails into a second folder - if it's the same algorithm, this would just be a UI/UX choice after all. I created a uservoice suggestion for that
https://outlook.uservoice.com/forums/322590-outlook-2016-for-windows/suggestions/39246127-now-that-clutter-has-a-reprieve-please-add-a-clut
Microsoft