What's so special about Zoom? If Zoom fell off the face of the Earth, by the next day everybody would have switched to any of half a dozen nearly identical services, many of them older than Zoom. Within another couple of days, everybody would have stopped noticing the difference.
We've used Skype, GoToMeeting, Slack... and finally Zoom, and Zoom was the best quality video conferencing by far.
No echo, no sound+video synch issues, rarely any "breaking up"... they must've implemented some very nice tricks to make all these work even when we have meetings with people sitting in from several different countries.
Despite their security issues, it's not surprising they came to dominate the market: it was the only product that really worked.
