of course not literally 'everything', but as someone that grew up in a post-git world, with github as the 'default', to me projects that don't accept (or expect!) outside contributions have been the exception; definitely aware of notable examples (sqlite? some web servers, a few internal-libraries-that-outsiders-use?) but very much used to the bazaar

i think the claim is that more projects are locking up contribution paths ~currently

Umm, I missed a negation there, sorry. I meant that the newest generation has only seen a world where there's a giant OSS ecosystem and the bazaar style is the norm for all of your tool and library needs.

Okay that makes way more sense. It seems especially applicable to web frontend, where everything seems to have been developed out in the open.