I think there is a difference between guns designed "from the ground up" to shoot steel cased ammo and ones that aren't.
Personally, I am underwhelmed at the performance of steel cased ammo, and its lower cost doesn't compensate for that, for me.
what someone else saves over 10,000rds in their gun is irrelevant to me.
I will admit to being a bit of an "ammo snob", in that I disdain to run the cheapest crap that goes bang in my guns.
I don't shoot steel cased stuff, I don't shoot Berdan primed stuff if I have a choice, and i don't shoot the non-reloadable Blazer aluminum.
Didn't steel cased ammo originate as a cost/material saving measure in WWII?
Some combatant nations went to steel cased ammo in a big way. The US didn't. There was one year, 1943, when the US produced a quantity of steel cased .45acp ammo. In 1944 we went back to brass. I think there was a reason for that, just as there was a reason we never made the "important" rifle and machine gun ammo (.30-06) with steel cases.
steel isn't brass. It works differently, it works well enough for some people in certain situations, but in other situations it doesn't. It is cheaper, it is not superior.
Even were I so inclined (and, I'm not) I couldn't shoot steel case ammo through about 80+% of my firearms, because steel ammo isn't made in those calibers. Being a dedicated reloader, and having only a few guns that would take steel cased ammo, and considering its drawbacks, steel cased ammo has no appeal to me.
Go ahead and use it all you want in your guns, I wish you well with it. It's not for me, or mine.