I was preparing to start a thread, although this existing thread provides an excellent forum.
My reports provide increasingly detailed market analyses based on various published sources as well as "the appraiser's subsequent independent research" that begins with the overall market and rachets down as subsequent filters are applied, until the subject niche--based upon the most relevant descriptors--is reported upon.
From a practical perspective, I'm not sure I'm not wasting time to satisfy my personal curiosity, not knowing whether intended users read that section.
From an intellectual perspective, I'm not sure I'm not wasting my time, because the "as is" opinion of value on an effective date is that and that alone, so to speak, without the existence of any exposure-related factors of which I might reveal that could do anything more than to justify the undeniable fact that market influences had everything to do with valuation--regardless of whether the market is stable, or whether values increased or decreased dramatically leading up to that date--and with the potential benefit of market research discounted even more so because of the absence of causality, as well as the implied caveat that prospective valuation is beyond the scope of the report.
So why bother other than to satisfy minimum reporting standards, or to appease my need to feel important--which is critical because "time" is our most precious, although rapidly depreciating, asset.