Doesn't it make sense if you ask: Given that someone will change the language they're using (and writes a public blog post about it), which are they most likely to change to?

It's not unreasonable to use that as a proxy for industry trends. I recall reading about manufacturing jobs which, sure, might have lots of factories not changing, but the ones that do change _definitely_ opt for more automation with fewer workers. That's still a trend worth thinking about.