Whitelines, the company who owns the patent on it, formulates it as "Dark lines distract, Whitelines don't".

https://www.whitelinespaper.com/product/wirebound-notebooks-...

Interesting, and that sort of jives with the reason I'm a bit put off by the idea - I think I'd find it too easy to ignore the lines because they're so much less visible than normal gridlines.

I'll keep this link though, and if I ever have a reason to use lined physical paper again I'll buy something from them and give it a try, because I am intrigued by the idea, maybe my impression is wrong.

Personally it’s easier on the eyes, like dark mode versus light mode on electronics.