Good old Microsoft naming. I'll never understand how they can think it's a good idea to release multiple entirely different products and call them all variations of the same thing. One would think they would have solved this problem a decade ago and yet every few years it happens again.
Someone thought this would reduce marketing budget, since they now cross-promoting.
I love how Microsoft will have three products that compete with themselves, e.g. Lync and Skype and Teams all coexisting at the same time.