You have nailed it all down, I must say.

Repetition is quite a large part of the human nature. And since that is so, trying to act like repetition is like an abomination is too stiff a hold. What I mean is, to have a an ecosystem that thrives, the ecosystem needs to be made flexible.

Flexibility, in the sense that, most authors get new insights when the revisit an article (or idea) of theirs because, with time and experience, their perspectives change and they see in a different direction.

Honestly, I personally can not feel comfortable of letting my new insight to an idea, that I have once shared, to die down or lay to waste all because I'm trying to "not upset" the ecosystem.

But with the way you nailed it, I now know better. Rather than being worried about upsetting the ecosystem, I'd instead work in a manner that would bless the ecosystem; which is "to write the repeated posts from scratch," like you have said.