But JS, from the moment it was introduced, was quite capable of carrying out a great number of interactions. We tend to project our subjective beliefs on the objective world. We don't see potential in JS and so we didn't use it up to its potential.

I recall working on a webshop back in the day that opened in an embedded IE in the app for a popular music company (so I had also full control over the browser engine and could rely on JS), and there was a complex system of discounts as you add plugins to your cart and so on, and I thought: I'll use JS for this. And despite the discounts were verified on the server side, all my coworkers and my boss were intensely worried about me using JS for this, because I'll make the store insecure, and this is a very noob thing to do and I shouldn't be using JS for this. And... it worked fine. The tech was always capable of this, but none of then would've even TRIED, because they "KNEW" it's not supposed to be done.

Eventually the tide turned, but it turned to another extreme, that is even more BS now. Many websites load more JS code than they load images. Why? Because we subjectively believe the server is not capable of all the richness that JS can deliver. Basically we didn't get smarter about any of this.

We're stupid and led by superstitition about the tech we use, we don't really understand it, we don't grok it. We go by fashion and trends. Most do. And that's the danger of starting a stupid trend. It may take years before the bubble pops.