Even without JS there's been a lot of changes over the years... in ASP.Net from 1.0 was a big mess, by 3.x it was nice, then came MVC, paradigm shift... that coupled with additions to C# and VS. There's been similar changes to Java, Python and others over the years too. Let alone Ruby which would never have gained ground if it weren't for Rails.

I will say for a 20 year old language, JavaScript has grown more in the past 6 years than it's first 14, and a lot of that is thanks to Node/npm.