> Comparing absolute usage of an old standard to newer niche features isn’t useful. The USB feature is niche, but very useful and helpful for pages

So, if XSLT sees 10x usage of USB we can consider it a "niche technology that is 10x useful tan USB"

> The fact that those two features are used similarly

You mean USB is used on 10x fewer pages than XSLT despite HN telling me every time that it is an absolutely essential technology for PWAs or something.