So it'd be ambiguous / splitting hairs for something arbitrarily near 90 degrees? And given that planets wobble, seems like that'd let poles flip arbitrarily quickly, which would be weird. Uranus might be too far off for this (~8 degrees is a lot more than Earth's wobble, it might take an impact to shift that far and then I think it's fair to reassess), but heck, it got to this point somehow, it'll happen somewhere else too.

For relatively perpendicular though, yeah - that largely works I think. But then we should expect most to be "sun rises in the east" as, as far as I'm aware, most solar system bodies orbit and rotate in the same direction as their star does.