Ok, I'll just rewrite my clients' entire website using a trendy, brand new JS framework that is built on top of an ever-changing trendy JS library, requiring the entire site to be compiled from scratch when my client wants to update a title.
Different tools for different projects. Gatsby and Gridsome, or any other static site generator is not comparable to a simple script like this.
Throwing a random script onto a website I was responsible for, which claims to magically preload things and make things faster is not my idea of simple. Easy, perhaps. Risky, yes. Simple, no.