99% of vscode themes are like the one he showed. IMO, the best themes do typically have minimal/functional highlights, which results in more text that is the base color.

I'd need a citation for that statistic, and I'd also need to see which themes are actually used.

> IMO, the best themes do typically have minimal/functional highlights, which results in more text that is the base color

And IMO, those are the worst themes.

These things are just preferences, but it is an objective fact that a good highlighting scheme makes certain information immediately visible, without requiring the reader to parse the actual characters. Whether or not this information is something you find helpful or annoying depends on your processing styles and preferences.