The trail of a wide number of different user's comments on this page has been deleted. I am wondering why and by whom?
Some of the comments may have been primarily about the re-opening of the post (- which now of course, it might be argued, is not necessarily useful for the readership). However, the majority of comments were simply contributing to grammatical and syntactic debates surrounding the example sentence. These (imo) should definitely not have been removed.
Users, I feel, should also be notified when comments are deleted. Some notice period would also allow users to copy or store comments and responses to comments, either for their own records or so that they could be incorporated into answers or new questions.
[An entirely different point here is that it would be helpful, in such instances, for comments regarding the viability of the post itself to be archived somewhere where users interested in the the meta-processes and editing history of the question could access them. This would provide some transparency as to the reason users and moderators have voted to close or keep posts open and inform readers about the quality of the moderation processes.]