opos, An excellent post and I totally respect your opinion. Speaking as a person who taught many newbies how to reload, I found there were varying degrees of mechanical aptitude. Some people went into orbit just at the sight of a progressive press with all the linkage and junk attached. Then there were others with a bit more mechanical aptitude that actually understood the entire reloading process .... which by the way is identical for a single stage, turret, or progressive press. Once the process is thoroughly understood, it's just a matter of .... do I want to do one step at a time? .... or multiple steps with each pull of the handle?
My conclusions for a newbie that has never reloaded is a bit different than yours and here's why: Assuming a standard single stage press, you have to install and adjust dies a minimum of 4 times to load each batch of ammo. This requires some mechanical abilities ... even though it is "one step at a time". In the process of loading a batch of ammo on a single stage, you will actually handle each case a minimum of 8 times .... once in, once out for each individual step. The more you handle each case, the greater the opportunity for a screw-up ... spilling powder, dropping a partially loaded case, spilling primers, or getting things out of sequence.
When the same person loads on a progressive press, the dies are adjusted in advance so if you load a batch of ammo a couple months later, the tool head is ready to go ... very little mechanical abilities needed. Basically, you are just pulling the handle, inserting a fresh case each time as well as a bullet. In this automated process, you only touch a case exactly once ... when you put it in the first station. Yes, you do have to keep an eye and "feel" on things. If something looks or feels wrong, it probably is. I can't speak for other equipment but my Dillon RL550 will usually go hundreds of rounds without the slightest hiccup .... then you may get a bad case, a defective bullet, or a bad powder drop, or a primer problem and have to stop and investigate. It usually takes just a few seconds to clear the problem and resume reloading. To minimize problems, I do cull my cases ... but I do that with single stage loading too.
Back when I had my gunsmith shop in Phoenix, AZ area, I had two RCBS Rockchuckers and a Dillon RL550 mounted on a reloading bench. The deal was ... if customers bought their supplies from me, I would let them use my equipment to reload for free ... closely supervised of course. This worked out exceptionally well .... my equipment soon paid for itself and customers got free training. Some customers learned that reloading was just not for them .... so they saved a lot of money by not buying their own equipment. More times than not, customers would learn the process then head to Scottsdale and buy their own press directly from Dillon. For those that decided on a single stage, I sold many of them as well as dies and other reloading accessories. I did this for 10 years and trained at least a hundred people to reload ... probably more. I never kept track but my guess is ... way more people bought progressive presses than single stages or turrets ... and for those that did buy single stage presses, it was usually a lack of $$$ ... not a fear of the equipment.
No doubt, a lot of people think exactly the same as you when it comes to buying a press ... and we all respect their decision. My point is ... many of the newbies out there will start reloading on a progressive press if they can afford it and we also have to respect their decision too.
Related to this thread, no matter what type of equipment you use you MUST ensure each case gets a uniform powder charge. You can do this with fancy powder check dies, trickling up each charge, or just by doing a good visual inspection. No matter which method you use, you have to check each and every case because ol' Murphy is just waiting for you to miss one.