It has always been about quality control. We tend to look at todays gun manufacturers with a certain amount of disdain, but seem to look at the older stuff through rose tinted glasses.
I am old enough to remember some of the good stuff was not really that good sometimes. Colt 1911's with mis aligned frame holes, "test fired" S&W revolvers, shipped without hammer noses attached, etc.
Nothing new under the sun, probably only exasperated by todays culture of workers seemingly not giving a ****, all amplified by the internet. Even in the days of hand fit guns, not all were necessarily good at their jobs.
Larry