> i mean hidpi displays themselves are very rare - if you check any desktop resolution stats they often barely are a blip

Do you have a link/cite for this? I couldn’t find easily somewhere summarizing pixel density stats.

“Desktop resolution stats” is not the same thing. All the retina displays have at least a 2x pixel ratio so these tables on a cursory Google search are clearly lumping 13 inch MacBook pros into the 1280x800 bucket for instance.

You got a reference to something that clearly is accounting for pixel ratio?