Now that I know the format, I can give a format-specific answer. First, these are the normal Pokemon that are common in OU:
Obviously, they both need to hold an eviolite or a Lopunnite in order to work, so there's no room for Chople berries here. Next, here are some electric Pokemon:
Tapu Koko can occasionally be used with a Shuca berry. However, it's generally much better when holding choice specs or Electrium Z because those items let it one-shot more stuff like Heatran.
Zapdos is not weak to ground.
Magnezone needs a choice scarf in order to outspeed many common steel Pokemon, including Kartana, Heatran, Excadrill, max speed mega Scizor, Bisharp, max speed Magearna, and max speed Celesteela.
Wash Rotom is weak to ground only when facing a Zygarde or a mold breaker Excadrill, while leftovers is useful almost always.
So basically there are just too many better items and those two berries couldn't get enough of a niche.