It does not improve my sites

First, did not break my site and it did lazyload most of the page images. It does not lazyload images if they are served from a different host. Example, unbounce, etc.

I will add another caveat, all of my images and their versions are always carefully resized and highly compressed.

Checked with lighthouse and my score took a hit downwards. 13 points down on performance score. I tested on my Staging area, uncached. FCP went from 2.1s to 4.2s, all of the other metrics, including time to interactive, CPU idle, speed index and First Meaningful Paint took a dive.

I will chuck this to I was already hyperoptimized and lazy loading is not truly needed on my site/s.

But I would advise others to try it out (not on their live site) and test speed with Google Lighthouse before and after.