I've been through several iterations of my website over the years and used different technologies.
The first versions were on Drupal 6 and 7 before I started to explore static site generators like Jekyll and Sculpin.
One version was written with a JavaScript-based static site generator, but it needed a lot of JavaScript to render a simple HTML website.
The current version has no JavaScript at all.
There is no analytics script, carousels or fancy transitions.
I keep the functionality as simple as possible.
It's fast, accessible and responsive.
If I'm considering adding something, I ask "do I really need this?".
What impact will it have? Positive or negative.
Do I want to take on the overhead of maintaining it?
If not, I don't add it.
If you don't already ask this in your projects, start.
