I think almost everyone making production 1911s is using some MIM parts these days. I have no issue with them, but yes, they can break if they get used abusively. I've seen forged stuff break, too.
I don't worry about them, if a part breaks, I'll replace it. I have several 1911s, and will swap one pistol for another, until I can get the "broken" one back into service with another part. For me, anyway, I'm not going to worry about it.
If you don't want MIM parts, you'll probably have to buy a Baer, Brown, Wilson, Nighthawk, or Alchemy Arms pistol, those run very high into four figure prices. I don't know if Dan Wesson's have any MIM or not.
