Having worked in an IT department in 2020, it wasn't just random. Zoom was stable for large meetings and scaled pretty smoothly up to a thousand participants. And it's a standalone product and it had better moderator tools.
MS Teams often got problems over around 50 to 80 participants. Google Meet worked better but its max was way lower than Zoom (250?). I tried a couple of other competitors, but none that matched up (including Jitsi, unfortunately).
So if you were at an IT department in an organization that needed to have large meetings and were looking for a quick solution that also worked for your large meetings , Zoom was in 2020 the best choice. And big organisations choices means everyone has to learn that software, so soon enough everyone knows how to use Zoom.
They were at the right place, had the better product, gained a dominant position. And now they are tossing all that away. C'est la late stage capitalism!
Reminds me of a sci-fi book series I read in high school. The premise was that a run down Earth had discovered predecessors that left some kind of central gateway to different places, and desperate or adventurous people went through in hope of surviving and finding artefacts that could make them rich.
Anyhow, in the later books technology to upload your mind had been found and used to be able to make decisions and deals without having to attend everything. Problem was that digital you pretty quickly gains experiences meat you never had, meaning it starts to diverge. Some weirdos let the diverge happen, but most people just wipe the digital you regularly and upload a new you. Of course the digital you may beg to continue to exist, making the whole procedure rather awkward. Pretty grim.
I think the predecessors in the end were hiding in black holes because of ancient evil or something. If someone else remembers the books.