Any time I want to check how to do something, to figure out a solution in isolation, I open a project in this repository.
Does it contain anything useful? That's a resounding "Maayybeee..."
Thing is, it is useful for me. I can figure out how to fix something without fighting a whole project build system, I can tinker the solution in isolation, I don't need to worry too much about breaking changes or how to fix tests...