Interesting thread with lots of angles I hadn't thought of. For me, however, it came down to simple economics. Back in the day, I had a diversity of different calibers (much more disposable income available at the time) and today I have narrowed my collection of firearms down to just specific models that correspond to said ammo. So it's not that I became "disenchanted" per se due to poor performance but solely to practicality.
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“A free people ought...to be armed..."