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·But apart from the fact that there are different views for aesthetic reasons, the fact remains that narrower bracelets give less support on the wrist. Or do you disagree there as well?
Definitely depends on watch size, weight and height.
Kind of still disagree too... "support" as you're calling it I would wager is more determined by watch caseback, the user themselves ~ above or below the ulna bone ~ and then lastly bracelet/strap width... and even then, bracelet/strap width at the lugs and as it transitions around the wrist.
I say all that because I am continually surprised (to the positive) at how light and seemingly inconsequential a bracelet in hand is/can be (eg: a Forstner Komfit or Bonklip) yet how absolutely perfectly they do "supporting" a larger/heavier watch head.