From "Whatever, Jamie" (a confusing newsletter name if you’re not familiar with it):

This last decade has seen an inundation of new JavaScript runtimes (and engines in equal measure), enabling us to run JavaScript in all manner of contexts with precise fitness for task. Through these, we've seen the language spread to the Cloud, the edge, Smart TVs, mobile devices, and even microcontrollers.

In this article, we'll explore what's driving this diversity, and why no one runtime or engine suffices for all purposes.

I found this whole post pretty amazing. I considered myself well versed in the various JavaScript engines out there, but it turns out there a lot more than I knew of.