[[[ To any NSA and FBI agents reading my email: please consider ]]] [[[ whether defending the US Constitution against all enemies, ]]] [[[ foreign or domestic, requires you to follow Snowden's example. ]]]
The article would be more effective if you cut the size by 1/3. I think it is possible to do that without losing any of the points.
Aside from that, I have two specific points.
We would like to highlight that the FOSDEM 2021 conference which used only free software (Matrix and Jisti) and hosted 30,000 attendees https://matrix.org/blog/2021/02/15/how-we-hosted-fosdem-2021-on-matrix which shows that for large conferences also we need not depend on proprietary software.
Please cite LibrePlanet first, for two reasons:
1. It used only free software in 2020 already.
2. It is a free software event, whereas FOSDEM is not.
In the pandemic time, our communications are being held via nonfree video conferencing software like Zoom, Google Meet etc.[Link to point 1 of Further Reading section] Hosting video conferencing via non-free software gives away control of our communications.
Video communications on Zoom are done via Zoom's central server which mistreats users in various ways such as snooping on users
The first thing to criticize about Zoom is that the client program is nonfree.