A lot of gun guys (like a lot of americans in general) simply ARE idiots. No way around it. Personally I think I'm about done with steel-case stuff, but I've shot a bunch of it without major issues. Just have to be sure to clean the chamber extremely well before going back to brass-cased loads or you'll get extraction failures. I still have some on hand, but once I run thru it, I don't know if I'll go back to it. Don't plan to, but I've learned to "never say never" when it comes to trying to predict the future.
On the Dillon press, I've never owned one. My progressives have never been anything but lower-end Lee Pro-1000's. "Progressives" plural, not because of having them fail & need replacing, but because they're inexpensive enough that I keep three of them set up for different calibers.
I have friends who use Dillon and love them, but to get true progressive function (ie, auto-indexing) with Dillon, you have to either go up to the 650 or down to the Square Deal. The 550 doesn't auto-index, so it's really more of a hybrid between a turret press and a progressive press than a true progressive; at least in function. With the Lee 1000, it's "set a bullet, pull the lever - set a bullet, pull the lever, set a bullet, pull the lever..." Simple & fast.
The Lee presses aren't as 'nice' as the 650, but when looking for my first progressive after a few years of reloading, the Pro-1000 was about all I could comfortably afford, so I tried it. That was more than 25 years ago and I still have (and use) that press. Big difference is that a Dillon 650 runs about $600 or so, where the Lee Pro-1000 can be had for $175-$200. So it's not only more convenient to keep a Lee press set up for each of three calibers and just swap them out on the bench mount, it's actually cheaper as well. Also means that I have two spare of most parts, and I also like that aspect of it.
The Square Deal B from Dillon seems like a very good press, and it does auto-index; but it's still twice the price of the Pro-1000 that has worked fine for me for literally decades now, so I'm not interested in changing or experimenting at this point.