Scott98: Maybe I have not been clear. The conformity I meant is with the people described. In "...follow them" them refers to such individuals. Their priority is accurate ID and observation, and not pleasure or gear as a hobby.
I am fortunate to know half-a-dozen such, and to be able to also discuss mag with them. Several others I know do so, and also follow them. In my "many of us" many is an, I think reasonable, extrapolation.
This does not result in changing often at all! Such people used 7x long ago, those few above-mentioned were at 8x on average about 20 years ago, they are now at 10x-8x, and probably this will not change for a long time to come.
The purpose in the OP is as above and not pleasure, but I do appreciate the pleasure of lower mag. (It also has intrinsic value, in woodland, but this is a priority only to very few users.)
PS. In my last post the last sentence is very important and I am sorry if that is not brought out. The reason for the change to higher mag (8-10 vs 7x) I think is the emergence of good, usable binos of higher mag. Comments on this from those with relevant knowledge across the relevant period will be valuable.