Most don't, but Facebook does have its own equivalent of jQuery, lodash and angular. A few other very large tech companies are similar.
Most C++ shops don't have their own equivalent of Folly, they use Boost or Google's Abseil or something else.
Most C++ shops don't have their own equivalent of Folly, they use Boost or Google's Abseil or something else.
So people extrapolating from a ~100 person company or a ~1000 person company using JS might as well think it's about the language, but it's really about the size, I think.