The U. S. used some steel cased ammo during the Second World War, at least in .45 ACP ammunition. It works for one time. In some applications, it works fairly well. I understand - and could be mistaken - it was primarily used in submachineguns.
There's a lot of 7.62x39 Russian ammo used in AK47 and SKS rifles. Those rifles in MILITARY configuration have fairly generous sized chambers. So extraction is not such a problem and steel cased ammo has NEVER been intended for reloading. In commercial calibers and commercial guns, there's a bit of an extraction problem. Not overwhelming, but it exists.
For me, I have little use for steel cased ammo because I'm a reloader. If I had a box of it - in a caliber I use (not 7.62x39) I'd find a use for it, but only in circumstances where I'd probably lose the cases.