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> owl selector is pretty slow when it comes to being processed by browsers

I'm sure this hasn't been relevant for about 15 years. CSS rendering is _fast_.

As I mentioned above - one or two clauses like that won't hurt performance, but I have seen situations, when bad CSS (a lot of *'s, too long selectors, a lot of dead and unused clauses) actually had a measurable impact on websites' performance.

This especially comes into play, if you deal with a lot of nested HTML elements or when you modify the site's HTML a lot.

That sounds like a different problem from using the owl selector. That sounds like bad coding and app design.

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