The advantage of Zoom was that it just worked. No more spending the first 10 minutes of a call making sure everyone is online and can see/hear you. Or at least greatly improved.
And other services also had their own easy to install app (I think Jitsi only dropped the desktop app fairly recently).
I think the only thing really easier with Zoom was remembering the name. I think the brand constitutes 99% of its success.
[1] https://www.ft.com/content/98635c63-b4ab-49a3-9c18-1de6819d6...