I think I have used weak equality once, because I needed truthy/falsy. I've always used strong equality. I always tell people that unless there is an absolute need for weak equality and you can thoroughly explain why weak equality works better than another solution, refactor for strong equality.

The all these weird quirks thing was really a naive me talking back then. JS was my second language after Java. Anonymous functions, async execution, implicit typing, weak typing - it requires a different way of thinking when you move from Java to JS and you're just starting. Most everything is explicitly defined, and everything executes in the order that is listed in Java. JS is whole different beast.