>Is Zoom here to stay or is video conferencing here to stay?

I think Zoom is here to stay at the enterprise level. Video conferencing was always a niche product until the pandemic. It was a big business, but never quite large enough to experience network effects. Now that it's a mainstream part of most people's lives, that has all changed. Zoom was in the right place at the right time to capture that, and it's going to be very hard moving forward for someone to unseat them at this point.