Of course, JS has a problem in this regard that while it looks like a language, it is also a (de facto) assembler for the browsers. So disabling anything in JS

Of course, JS has a problem in this regard that while it looks like a language, it is also a (de facto) assembler for the browsers. So disabling anything in JS will break lots of sites which will never be fixed. However as far as programming is concerned, many things have been deprecated through transpilers and linters (for example "==" throws a warning in ESlint).