> 27" at 1440p is 108.79 PPI. > most 4k displays were 27". This is in the direction of lower PPI/DPI, which is worse. That is: 4K @ 24" > 4K @ 27" The OP

> 27" at 1440p is 108.79 PPI. > most 4k displays were 27". This is in the direction of lower PPI/DPI, which is worse. That is: 4K @ 24" > 4K @ 27" The OP chose a higher PPI/DPI than what is available for most 4K monitors. Also, as others have noted, the Apple Studio Display is 5K, so more UI is visible than on a 4K monitor.