>I think there are a lot of developers working in repos where it's almost guaranteed that their code will _not_ still be there in 10 years, or 5 years, or even 1 year.

And in almost all of those cases, they'd be wrong.

In my experience the code will, but by year 5 nobody is left who worked on it from inception, and by year 10 nobody knows anybody who did, and during that time it reaches a stage where nobody will ever feel any sense of ownership or care about the code in its entirety again.

It's important to know which type of repo/project you are in and hire/code accordingly.

I've seen mismatch in each direction..