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what are those links for?

Reposts get relinked.

I’ve always seen it as a good way to let people new to a topic see the full discussion that’s already occurred. You get more insight

My question is; Why did it get down-voted to oblivion, despite it being a normal practice on other posts?

My guess is usually when I see it, there's at least a single word description with it, such as "dupe" or "see also:"

it can be read as "this has already been posted" instead of "prior art" when the latter isn't explicitly specified

Previous submissions of same project