I would be curious to see an article about why this happened? Is Zoom better than their countless competitors? They all seem pretty similar in my experience so why is it Zoom that is blowing up because of this and not any of the other companies?
But like, if we're being honest, it probably has a lot to do with how easy it is to start a Zoom call and invite people. You can host a 40 minute meeting for free. No one needs to sign up anywhere. It's super easy to install but also works in the browser if you can't install it. Computer on the fritz? You can call in from your phone. And yeah, they've also used some dirty tricks to make it as easy as possible, and some of those measures (like the auto-reinstall thing) were probably unnecessary. But they've clearly focused on being super super easy to start using, and when their moment came they were primed to seize it.
Last weekend my family had a "month's mind mass" in memory of my grandfather who passed a month ago. We were able to get dozens of people, many of them very non-technical, into the call, and we started basically on time. There was no "it doesn't work on my old phone" or "you mean I have to sign up for gmail?" or "whoops I couldn't get in because I signed in with my work email". That's why Zoom is winning the game right now.
And even then the browser interface is hidden behind multiple attempts to make you install and use their client instead.
Zoom is better than the alternatives on most verticals and has good PR. In fact, justified privacy concerns aside, it's hands down the best vid. conference app I've ever used.
I do think WebEx does some things better than Zoom (I like to share 2-3 apps - for Zoom it's 1 at a time or entire desktop) but Zoom has led to better client adoption for us.
I suspect it seems that way because Zoom was already more aggressively seeking media spotlight as a growth startup, and experiencing more rapid growth in terms of multiples because it had a much smaller install base to start with than established competitors. Also, Zoom is the center of it's company’s business whereas Slack and Webex are just part of a large stable for their respective firms.