[freetanga]

My take is the pandemic forced a lot of people who did not use much Skype into Teams, Zooms, etc. Then WhatsApp joined in too.

A much bigger number of people that had never heard or used Skype by 2018 were VC jockeys in 2020. The critical mass moved on, network effect did the rest.

[orev]

It was definitely this. Skype was already on the decline, and then COVID hit and everyone had to work from home. Meetings apps took over (Zoom, Webex, eventually Teams (Microsoft antitrust violation)), and in that business battle most had free tiers. It was easy for people to use their work account or the free version of something they already knew how to use. There was no reason to sign up for Skype for anyone not already on it. Then the social network effects took care of the rest.