We were using MS Teams and we kept using MS Teams.

I did think the sudden massive adoption of Zoom was very strange. Like you said I had never heard of it before the onset of the pandemic. It seemed to grab a critical mass of attention right when people were looking for a reliable cross platform solution.

I remember when Apple was introducing Facetime they promised that it would work across different platforms, but then it never happened. If they had gone through with that promise it very well could have been where Zoom is right now.

I just looked around to see if they have any plans around this and funnily enough this was just posted hours ago: https://www.cnet.com/news/facetime-on-android-apple-announces-major-upgrades-at-wwdc/