I've seen two separate analyses recently that suggest that the use of LLM to create software reduces collaboration during development.
https://lucumr.pocoo.org/2026/7/13/the-tower-keeps-rising/
https://blog.mempko.com/a-million-kakapos/
I think that this is plausible. I think certain domains will be left where it's still worthwhile to collaborate: software that is high risk if fails, software that is deeper down the stack (OSes, languages, and some libraries and frameworks etc), very complex sets of rules, and software pushing the boundaries of what's possible.
Outside of software, areas of concern where truth and sources are valued strongly, like Wikipedia.
It also really sucks on a human level. Here we have this wonderful semi-anarchist open source commons...
And on a personal level: we're going to be collaborating less. It was already bad enough where often the only collaboration happens on PR review...