At least what I saw, which might be inaccurate, is that in countries with 6 month mandatory reporting, most companies still choose to report quarterly or investors start to get nervous.

Hard to disentangle that from quarterly being the US standard, what with it being the most robust capital markets and nexus of major financial transactions.

Please read the article.

> The WSJ report added that the rule is expected to make quarterly reporting optional and not eliminate it altogether.

So companies can still do their quarterly reporting if they and their investors want that.