Google and Facebook -- two of the biggest software companies are incredibly C++ focused -- especially in backend/infra. To a lesser extent Microsoft and Amazon are the same. And as others mentioned, trading farms love C++ too.

Essentially, in 2020, the highest paying software companies in the world all are heavily invested in modern C++. Knowing modern C++ is the biggest advantage you can have in the market. But you won't know that from reading the HN comments section.