In searching the INGO site, it appears that a lot of people have more than one.
I can see myself possible having 3 in total a 19 to carry, a 21SF (full size Home Protection ) and or maybe a 36-Slimline to carry , my wife may not let me come home after the 1500
4...2 G22's, G23c, and G27. I think I have about 20 15rd mags that will fit all of these. To be fair, 1 G22 is my department issued gun and the 2nd is my old duty gun that I bought back.
I have two (one for each hand) just like everyone else.
A G22 with conversion barrels so I can also shoot 9mm and 357sig. it's the perfect handgun. And of course a G29 that I keep full power loads in, just in case a cantankerous Polar Bear wonders into the neighborhood.