>Open source authors do own their IP, but are altruistic enough to license it to others.

And when they do, they give up many of those rights in the process. At the very least they give up any right to tell anyone else what they can or can't do with "their" code. The entire premise of FOSS is that software belongs to the community, not to authors. It is fundamentally collectivist, anti-ownership and anti-capitalist at its core, and only recognizes concepts like IP and copyright out of legal necessity.

>Now, this has changed, so there is no longer any point of writing OSS for free.

The only thing that's changed is that a new generation of open source developers have lost the plot now that software has become a billion dollar business and suddenly they want to get paid for work they voluntarily gave away for free. The point has never been compensation.

Again, if programmers want to get paid, they can use a proprietary license, or write code for a corporation and get a paycheck. Or get a second job. Otherwise the complaints from people who likely have never contributed so much as a dime or a single PR for any of the FOSS code they use, and who chose the FOSS path out of a belief in its moral superiority to the capitalist incentives of proprietary software, are starting to get tedious.

once you distribute your code under a permissive licence, you typically don't get to undo that surrender of control over your work

in that sense ownership is relative, for better or worse

writing OSS will always make sense, for certain kinds of projects and perhaps without expecting much compensation fo it most of the time