Agree it's worth considering, but what it really comes down to is avoiding the extremes of fashion. That's pretty easy. Common sense tells you that a sportcoat that ends above your rear isn't for conservative business, now or in the future. But some guys might benefit from a slightly shorter coat, or they might look good in narrower lapels. It's something to consider, at least. But there's unending discussion here of finding RTW that's "timeless," and that's a false hope. It's antithetical to the business of RTW. What you're wearing either looks like what the shops are selling or it doesn't. That's frustrating for many guys, but there's nothing noble about abdicating your responsibility to determine your personal style. How many guys do you see posting here and at AA who end up looking dowdy or dated now out of fear they'll look dated in the future?
In short, it's not that I don't think it's worth considering, but I think SF frets about it disproportionately, to the point it can paralyze the development of individual taste and style.
I know I am late but this is the reason Doc Holliday is my fave poster from the old regime.