At least at the companies that the article is mentioning (Citadel, for example) the pay for coding in c++ will likely be 3x _more_ than writing some basic JS.

At least at the companies that the article is mentioning (Citadel, for example) the pay for coding in c++ will likely be 3x _more_ than writing some basic JS. New grad packages are usually in the 4XX-5XX range.