Wikipedia survives while the rest of the internet breaks

Wikipedia is fabulous. I wish educators would stop telling people that it’s not reliable, and start using it to teach media literacy - which, for wiki purposes, is essentially to read the talk page to see what viewpoints have been included and excluded and why.

My daughter's teacher told her class that Wikipedia is unreliable because it's just made up by volunteers. So I asked her where they should find information and she said other sites on the internet that can't just be edited by anyone.

Blew my mind.

Had a colleague make the same point on open source, "don't trust code everyone can modify". He was a bottom tier programmer at best.

Is there any modern programming environment / IDE / toolchain / etc that doesn't heavily rely on open source work? Even initially-proprietary solutions like .NET are mostly OSS nowadays.