Did they really? Microsoft championed Teams and its pretty accepted in corporate environments today, especially if they are already on Microsoft.
Afaik, Skype for Business was merged into Teams. Skype for non-business consumers has been virtually dead for longer. The way I see it, Microsoft let go of the brand, the value of which is questionable in this decade. When they bought it, I remember the rumors saying it was because of its voice codec, which probably got used in everything from xbox live to teams in the end.