If a library requires pyparsing>=3 and another library requests pyparsing<3, that’s the end, you are out of business.

This article is very much only applicable to Python and other package managers that don't scope dependencies. I think nuget (.NET) also works like this.

In Nodejs land, if you depend on pkg v3, and another dependency needs v2, they'll happily co-exist with no trouble, as long as those v2 and v3 didn't need to talk to each other. If you did only want one version of a package, that is also supported with peerDependencies.