Ah, yes, I've been asked to use Microsoft Teams for a call. But only once? How is the OS manufacturer behind the curve on popularity if it's integrated into Win

Ah, yes, I've been asked to use Microsoft Teams for a call. But only once? How is the OS manufacturer behind the curve on popularity if it's integrated into Windows 10 and Office already? It's just quite surprising. I don't know if they did a bad job or if the momentum was just unlucky. But I have no idea how the OS manufacturer wasn't able to dominate this market.