Why doesn't XF call enqueuePostUpgradeCleanUp automatically?

[Sim]

Referring to the new automatic file cleanup feature in XF 2.3, the announcement says the following:

Developers who wish to trigger an automatic clean up of their own files, can do so by calling the following from within their add-on Setup class in the postUpgrade method:​

​

PHP:

$this->enqueuePostUpgradeCleanUp();​

​

My question is - under what circumstances would you not want to run this?

Is there a reason why I shouldn't just add this to every...

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Why doesn't XF call enqueuePostUpgradeCleanUp automatically?

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