Jitsi is a great piece of software, as are the other alternatives listed on the web page. The opposition is not with other self-hosted videoconferencing solutions, but with cloud-based systems that impose restrictive usage conditions.

How do we convince people to switch to self-hosted solutions? I think that part of the solution lies in making them easier to deploy: ideally every high school, every community college should be able to have their own videoconferencing server, which can be used for lectures, for practicals, for student-teacher meetings ("office hours"), and hopefully for student socialisation (although in my experience students tend to prefer Discord, notwithstanding their outrageous usage conditions).

Galène is designed to be as easy and cheap to deploy as reasonable. It also has a number of features that make it useful for practicals (sharing multiple windows simultaneously, automatic creation of subgroups), which we found very difficult to organise online during the first French lockdown.

I thought the same. Really cool they list the alternatives on the project page. But a little something on why they did not use the alternatives but built their own would be very helpful for those evaluating the options.