User blog comment:Edwin Shade/In Which I Try To Derive Values of Madore's OCF on My Own, and See How Far I Get/@comment-34434829-20180125192753/@comment-32876686-20180125212026

You bring out a good point, but as long as I have learned from a person's response, the response is then stored in my brain and I'll remember it for a very long time. So even if they have put effort into it, it does not matter whether or not the representation of the response stays, it only matters that I have the knowledge of the response in my mind, because their intent was to teach me, not to leave a comment that would last for a decade.

Also, when I am able to delete these posts I'll archive the good responses in a separate user-page, so even then they won't be permanently lost.