Now now, I never said they were more focused on a particular timeframe than us, I said more of them are focused on one theme, and that stands to reason considering there are move of them! There are plenty who still buy whatever Hornby and Bachmann churn out of course. I focus on two periods on BR myself. One I have memories of (late 80s to late 90s) a period when I spent a lot of summers over there, and one I have no memories of (60s steam - diesel transition) but find infinitely interesting.
And as much as I love the sounds of a baby GM and 071s, Deltics, 40s, 50s, 56s, Peaks and 37s sound awesome to me. Diff strokes, but that's what makes this hobby great; diversity. At the end of the day it's not a 'my interest is more valid that yours' hobby which is great!