I've been wanting to remove needless JavaScript (preferably all) from my website for a while now, but @brentsimmons@micro.blog latest blog post has pushed me to actually begin that process.
http://inessential.com/2019/05/07/the_feature_i_most_want_in_web_browsers
The two primary uses of JS are my masonry gallery layout, which can be done via CSS, and syntax highlighting, which might be a bit trickier.