I understand that, It makes sense that not everything is for speed, etc., but for ease of use. This actually makes more sense than simply doing so to load XX more per hour.
I have not noticed any decline in the quality of my reloads. (missed primers, etc.) Machine is circa 1965, but has been maintained. Cleaned when needed, never forced, not abused. I think that makes a difference in their longevity. Only time I experienced some problems, that I can recall is when I changed something. Differant primers, brass, etc., and all were short term.
Certainly, the main componet is knowing the feel of your particular machine. That alone will lesson the problems.
I wonder how many people learned the hard way. Starting to reload, doing a few hundred in a few hours, only to find a problem after the fact, instead of before.
Kenn