timmmay:
So Mac can't scale text to a standard resolution monitor? Sounds... daft.
OSX is deigned for 5K Retina (about 220 ppi). It scales exactly to 6K and 8K but text tends to look blurry at lower resolutions because the letters and icons are intended to be pixel perfect at the 5K, 6K, 8K Resolution and at lower resolutions they are not displayed accurately enough.
That is why the iMac was 5K, the Studio Display is 5K and the Pro XDR display (the $10,000 one!) is 6K.
There are reasonably substantial rumours that a new 'Studio Display Pro' in 6K with 120Hz Pro Motion and mini LED will be out next year together with a 7K or 8K update of the Pro XDR.