[edwinnathaniel]

Since I've gone through the same experience like this, I'd like to know if this is a norm :D.

I've seen people do write-up of how they re-write the front-end from jQuery to Angular|Ember|React so it's not like there are many long-running JS projects that require solid structure. 3 years old (small-medium size) projects tend to get re-written.

Here's another one that I've seen and experienced before: 10 years old product where some section of the products are written in pure JS, some section in jQuery, some section in BackboneJS + Marionnete, some section using EmberJS.