I feel like this is spreading misinformation about scala. Those are not operators, rather methods. It’s syntax rules are fairly simple to reason about.

The problem here is more the growing language syntax complexity of JavaScript

That being said, just because you can name a method ‘||=‘ in scala, doesn’t mean you should. A lot of us scala devs realize that it’s not very readable. Symbols as method names should be used rarely if at all. But One can write unreadable code in most any language with poor naming, and that’s all this is