X-Men's Ban on Clones Has a Secret Real-Life Purpose

screenrant.com:

Few Marvel heroes like clones, and that is especially true of the X-Men's Quiet Council. The ruling body of mutants on the island of Krakoa specifically forbade the resurrection of duplicates as part of their game-changing Resurrection Protocols. However, this in-comic ban by the ruling body of mutants seemingly had a secret real-life purpose for Marvel itself, as editors discourage writers from introducing 'doubles.'

In House of X #5, by Jonathan Hickman and Pepe Larraz, Professor X and Magneto united the Five: five powerful mutants that are able to combine their powers to resurrect the dead. Protocols were then established as to which mutants would be eligible for resurrection. Though this rule has since been scrapped thanks to a rebellion by the Five, it applied to mutants that would not be considered unique beings, such as Madelyne Pryor (a clone of Jean Grey), Gabrielle Kinney (a clone of Laura Kinney's Wolverine) Stryfe (a clone of Cable), and Kid Apocalypse.

Related: Spider-Man and X-Men's Most Notorious Clones Are Finally Teaming Up

While showing that Krakoa's utopia still has some prejudices left to conquer, this also has some obvious practical benefits, as Marvel history has created a lot of mutant clones to keep track of, so thinning them out is useful for such an ambitious revamp. However, in an interview with AIPT, Jordan D. White — the X-Men Senior Editor at Marvel — confirms that writers are actively discouraged (though not banned) from introducing new versions of existing characters, saying:

‘Rules’ is too extreme, but I caution people about doubles. We don’t need more doubles. But with the X-Men, especially, you’ve already got hundreds of characters — do you need five versions of the same character in