I've recently come over to SU to ask a question, being an active user on SO. It seems at least here, that the opinion is that informative comments ta should be deleted, and wonder why that was so? I was especially co fused to hear that if the OP doesn't edit their post with that information that they would be flagged for deletion.
This, to me, seems odd. Although yes, some information should be editted into the original post, some questions that are asked in the comments may not actually the pertinent to the question the OP has asked. Adding details of what is irrelevant based on questions on comments would seem silly, and just bloat the question out.
The deletion of the comments, as well, would mean that other volunteers would be deprived of the knowledge. That seems quite counter productive.
This certainly isn't the way I've seen SO used, where the a comments might ask about something, which can easily be answered as not relevant, and those comments certainly remain on there, for others to see. If the response, by the OP, does add something to be editted in then yes, then OP should be encouraged to do so, but it seems odd to flag that comment for deletion; or more so to delete the original question itself. It feels quite counter intuitive.
If the OP were to respond, and then, perhaps, not come back to the question till the following day that comment may well be deleted, and more people have asked. That does not make a good experience for the users.
It would be great to hear some feedback from the community of SU here.
Edit: apologies for the typoes, posted this from the phone. I'll ensure to correct them when I'm at a PC next, but doing so on a touchscreen is difficult at best.