As I’ve commented before, I’m not personally sure that adding comments to views is the way to go to meet your use case. Not to say I don’t get what you want, I absolutely do. And yes a dedicated feature to handle it would be nice. But… I don’t see it as such a valuable long-term use case that it needs a whole dedicated feature when otherwise commenting on a View doesn’t seem like a frequently needed thing (to me).
Instead I once again think that you could achieve exactly what you want if we had Embed Custom Views into Entity View (or Rich Text). Simply create a Doc that you call whatever you’d call the View or, alternatively, create a Type called “Dashboard Views” or something, with a big Rich Text field that you use to embed views, then write text, comment, tag people, etc. to your heart’s content.
We already know that the embedding feature is planned and will enable a tremendous number of other use cases, now including - as far as I can see - this one. Maybe I’m missing something, but doesn’t it make sense to go that route, even if it’s a little clunkier, given what it seems might be involved in adding a whole new way of interacting with Views?