Definitely true in general, but I think it's more noticeable in the JS world. Look at Java + Spring, C# + ASP.NET, Python + Django, Ruby + Rails: these are all

Definitely true in general, but I think it's more noticeable in the JS world. Look at Java + Spring, C# + ASP.NET, Python + Django, Ruby + Rails: these are all examples of popular frameworks that have been around for much longer than any single JS library (except jQuery), and are all still in high demand.