Awesome!
If there's one thing managers are always keen for, it's having their employees "spontaneously and ephemerally involv[ing] others in [their] work".
Look, these kind of things have real benefits and freeing people from an application (e.g. Word & Excel) or file-share centric view is an attractive proposition - at least on the surface.
When it comes down to it, most employees are task-focussed and giving them the ability to work in that way can be good.
BUT . . .
From a data-management perspective, things like this can be a real headache and the result can be that no one really knows where a given bit of data may sit or how to retrieve it. This can happen particularly when a staff member leaves.
There is a lot of richness and potential in the Office applications but when you have a bubbling cauldron or OneDrive and 'Groups' and Outlook and Delve and Yammer and Sharepoint and now Planner and GigJam, things can quickly get very complicated.
Much of this seems to be around the idea of showing you all the stuff you - or your colleagues - are working on at a given time or related to a given task without having to worry about getting this bit from here and that bit from there.
That's cool but it's also a double-edged sword because people ('users') tend not to really think too much about where things are stored.
We have users who rant and rave that their files have been deleted and they need them urgently when all that has happened is that they aren't showing up on the recent items list in Word. They have no idea WHERE the documents are stored because, to them, that's how they access those files.
Likewise with things like 'favourites' and 'libraries' and so for showing up in Windows Explorer. In a way it's nice because it allows users to just access that stuff without having to worry about where it is but the moment it goes wrong, people can't work. Or they are saving things but really don't know where and can't find the files again if their shortcuts ever stop working.