For instance, if a system like Matrix included everything Slack and Discord charge money for free. Could that basically make people not want to pay for said features ever again, and get rid of the market altogether?
In theory something similar happened for programming languages and web browsers didn't it?
https://www.theverge.com/2019/8/20/20813510/microsoft-chromi...
Back in the 1980s there were "cheap and cheerful" compilers such as Turbo Pascal, I think those have been squeezed between free tools and Visual Studio.