High entropy alloys come to mind. There are so many possible metallic combinations when you mix 5 o 6 metals in equal proportions that they all end up being in a single, homogeneous combinantion with about one atom of each per crystal molecule.
Oh wow I thought this was a simpsons reference to when Mr. Burns has too many diseases, that none of them can take him down. Cool that it's a real thing
The three stooges effect I see. Too many corrosive elements, they stop each other from getting through the door.