Sadly, my experience has been the opposite, because open-source stuff usually takes more work to run and is seldom as polished, and users hate that. I rarely,

Sadly, my experience has been the opposite, because open-source stuff usually takes more work to run and is seldom as polished, and users hate that. I rarely, if ever, recommend open-source anything for end-user use. Zoom did well because it had the least hassle of any solution, hands-down. I'm not saying it's impossible to subscribe to a hosted open-source service that's as good, but it doesn't exist yet.