Groo here
The main reasons for the 9mm in LE is #1 cost, [ammo and gun]
and the ease of shooting [ ease to qualify].
The test are just an excuse to change .[ 9mm is "just as good"]
The 357sig is based on the 357 mag revolver round and we know
it's performance on the street.....
I have a few , yes they kick ,they shoot flat and accurate [like a 357 mag] and hit hard.
[I just converted a 40 shield to 357 sig Oh Ya......]