Comment by kazinator

The problem arises when you're not using old libraries and frameworks. You're using new stuff, and come across an old, unmaintained library you'd like to use.

Hey, it uses the same frameworks you're using --- except, oh, ten years ago.

Before you can use it, you have to get it working with the versions of those frameworks you're using today.

Someone did that already before you. They sent their patch to the dead project, but didn't get a reply, so nobody knows about it.