Years ago, viewer stats accurately showed total pending downloads, not just the value of 1 at a time.
Whenever you go to a region where people are constantly teleporting in or are attaching things or are rezzing things and you try to also do the same, sometimes you're sitting there waiting 10, 20, 30, 60 seconds for your object(s) to appear.
Looking at stats does not help as it only shows a maximum value of 1 for pending download at a time regardless of how many are in the queue.
Pending uploads (takes/detaches/returns) are not affected as it is capable of showing more than a value of 1.
Having an accurate reading allows users to know how busy the region is before attempting attaching/rezzing and to see/track their place in the queue when they do so.
Scripted rezzers, thanks to llGetSimStats(SIM_STAT_ASSET_DOWNLOADS), can also better track queue placement and content 'arrival' times.
If changing the output of the metric in viewer stats is not feasible, please give us access to the rez queue count metric via a new llGetSimStats() constant so a scripted means can be used instead.
Thanks.