I view this site as having a primary respondent that is the OP of a question. Thus, I try to limit myself to the question asked and not go into details about related things that may have to do with the original question indirectly. I was asked to elaborate on something that appeared to me to be off topic from the original question, although it was related. Should I have elaborated? Is this off topic? More generally, if something is not asked in the original question, should it be answered? If so, when?
Here is the link to the posted answer: Bandwidth vs. sampling rate of DAC