During a fairly heated exchange regarding this question
A number of user posted comments which were not constructive and quite snarky. I have fairly thick skin and such things don't really bother me however the subsequent rebuttal comments by other posters, which took time to craft, now make no sense and are a complete waste of time and effort.
As well as the waste the conversation has absolutely no context or narrative for anyone else coming to the question to read it.
In addition, allowing comment deletion lets users post insults, baiting comments or other type activities and then delete the comment after having trolled the question or answer.
Should we limit the timeframe for comment deletion?