"Untyped" means, for example, you can't tell a string from a number, because they are the same type.

You mean "not statically typed". Which also applies to Javascript, PHP, Python, ... so if that critique doesn't stick to those, it's not a critique you can level at Ruby.

Typescript has almost universal adoption at companies now. PHP I can’t imagine any company choosing for new work anymore. And Python I’m not terribly familiar with but it does seem to be moving towards types.