[Karunamon]

Are JS developers often adding empty arrays and empty objects together? This seems more like a corner case than a real issue.

(Not snarky - I don't know JS)

[rdtsc]

As often as any programmers deliberately insert bugs in their code ;-)

Those values are usually in variables that and have been set maybe from a backend reply or from the UI at some point.

That is just one instance of the sloppy mess of weak typing. Instead of writing a long list of it I just used an example to illustrate.

[tokenizerrr]

No. You generally only add numbers and strings together.