Even if you are reasonably light/ strong, the 33 or even 36 cassette combined with the smaller rings upfront can be a boon!
I am racing (fingers crossed) in the Alps this summer and there are several >10% climbs that are several kilometers long.
On an 11-12% climb, I need to put out 5W/kg even in the smallest gear (37/33) to remain seated at 85 RPM). Having the possibility to go 36 at the back means, I still have one more gear without going over threshold.
I think a wider range benefits a lot of people… likely the vast majority.
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