I was quite confused when I learned that the spec technically supports metadata about whether the data is already pre-sorted by some column(s); in my eyes seeme

I was quite confused when I learned that the spec technically supports metadata about whether the data is already pre-sorted by some column(s); in my eyes seemed like it would allow some non-brainer optimizations. And yet, last I checked, it looked like pretty much nothing actually uses it, and some libraries don't even read this field at all.