For those who don't know, the FOSS revolution came about in the late 1990s and as a popular movement was largely fueled by concern over the extent to which Microsoft was dominating the PC and (then) PC-based server industries. MS was moving to embrace-extend-extinguish the web at the time too. The Free part of FOSS was critical to competing with Microsoft in the late 1990s, since MS's Achilles heel in the market was its costly and cumbersome licensing schemes.
Times have changed quite a bit since then. Today's behemoths are not based in software but in services with network effects. The bad behavior of those behemoths revolves more around exploitation of network effects to lock people into services (not software), and of course the mass surveillance and manipulation of public discourse that becomes possible when everyone is working in a closed silo.
FOSS is utterly worthless as a strategy to resist network effect oligopolies and surveillance capitalism. In fact it might be worse than worthless, since many of these surveillance honeypots run on open source software. If you write and release FOSS today you're likely giving free labor to people who will use your tools to spy on you and manipulate you.
The difficulty we face now is finding a viable alternative to surveillance capitalism as a way to fund software. The Commons Clause is an experiment in that direction. It may not work, but experiments are welcome.