I suspect an enormous number of those are WordPress blogs and MediaWiki sites, and I don't feel like that number is very useful without breaking those out. It's

I suspect an enormous number of those are WordPress blogs and MediaWiki sites, and I don't feel like that number is very useful without breaking those out. It's a bit like saying Fortran is popular in data science because SciPy is implemented partly in Fortran — not so much an indicator of overall language health as it is an artifact of one product's popularity.