crunchyave
Whether or not Facebook is paid or free or not, it would still be a place populated by a list of friends/family you either barely know or don't see IRL, spouting unsolicited opinions or posting uninteresting baby pictures, etc. And I think ads would probably still sneak in, via fake accounts that just spam and share products. Maybe some of the noise would be cut down via people quitting the platform, but the worst offenders are addicted to facebook, so I think they'd stay.
I quit facebook probably two years ago and there's really not one thing about it I miss, so I certainly wouldn't pay for it.
How Automation Will Change Work, Purpose, and Meaning
The Physicist Building the World’s Most Precise Clock
Reaktor 6 had a similar thing happen, lots of people who hadn't used it before were brought into that ecosystem by their "blocks", which also kinda emulate Eurorack.
VCVrack is open source, but as an end user you're not dealing with the low-level stuff out in the open the same way you would in PD. It's a completed object rather than a set of legos.
Having said that, You're right about the GUI. The PD GUI is... primitive, to say the least.