MIM is a cost cutting measure that profits the manufacturer. Nothing more. And when it breaks it looks exactly like cheap pot metal.
When I see Wilson Combat or Les Baer putting it in their guns then perhaps I will reconsider. But I don't consider or value, the opinions of fanboys.
I recall that the absence of MIM parts was a selling point in S&W Performance Center ads. Back before the "Performance Center" was just another assembly line in the main factory. YMMV. Regards 18DAI