This can be said about most of the anki functions. Each function is individually used by a small number of people, but if you sum it up, there will be a lot of such people.
I often help users get what they want from anki, and it’s almost always possible. This is due to all these unpopular features. Those who do not need it can simply ignore the existence of these settings.
How will a user know what to ignore? I’ve been trying to use Obsidian recently and there are five hundred different menus that can be used. If someone told me, “Well just don’t try to understand what you don’t need”, I’d honestly be at a loss of words. Compare this with Notion and we can clearly see why one is more popular than the other.
Though I do think this has to do more with the development philosophy of Anki so it’s no use arguing here.
There’s “Custom scheduling”. A far cleaner solution than showing people 19 random numbers.
Why use the custom scheduling code though? The native FSRS is much more convenient and user-friendly.
Btw, this guide hasn’t been updated in 10 months because, frankly, nobody uses the custom scheduling code anymore since Anki 23.10.