If i use a lot of under stack's, have it bad repercussions on the algorithm?

I want to use more under stack’s to orgenize my learning stuff. And to learn specially themes without other themes. But i hear in a few tutorials that it is bad to have to mutch under stack’s. Because it can deteriorate the algorithm.

Thanks for help.

Shouldn’t detoriate the algorithm but yeah it’s probably better to use tags than subdecks, and use custom study or filtered decks if needed, I don’t remember.
But have you searched what it detoriates exactly?

This section of the manual could relevant here: Adding/Editing - Anki Manual

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@4649ceynou No, I heard it interfered with the algorithm