[eps]

I'd venture a guess that string_view, static_assert and bit were already a part of respective codebases, just in-house versions. These are very commonly used. So seeing them getting adopted is completely unsurprising.

However the adoption rates of newer C++ features are in fact new are way lower. From what I see lots of projects still use the language as C with Classes, basically, and that ain't going to change any time soon. The GP nailed it - C++ is adding a lot of esoteric stuff that very few people actually need or want.