WFH has caused an explosion of teams in the (more MS dependant) biz world.
Skype for business can't cut the same integration or group capabilities. We're on daily, some from phones, some via teams web, some via teams client. Just.. works.
Would not be surprised if unification shifts to it and Skype drops off the radar as many suggest.
You can add off-site/prem clients to have meetings with you and so on now too. And apparently working with BJ for cross platform connect.