A self-selected cadence of 95–100 rpm at speed (= high rotational inertia) seems completely normal to me (not just looking at myself, but also my riding buddies). When I switched to shorter cranks, my self-selected cadence increased by a few rpm, so it reaches up to 103 rpm (presumably because my self-selected cadence has to do with the linear leg speed). Doing 60 km/h at about 110 rpm doesn’t seem that far outside of the comfort zone of most very fit cyclists. With a 46-tooth chainring, I’d have to turn the crank 100 times a minute, which seems completely normal.
Sure, some people might prefer a lower cadence or are triathletes or TTers. But triathletes and TTers aren’t choosing larger chainrings, because they need the extra gearing, they do it for marginal gains (straighter chain line, ratios being realized by larger cogs).
I live in a big coastal city in Japan, so I have both, pancake flat courses with “Dutch mountains” (aka wind) along the coast and proper mountains if I head inlands. I can climb from sea level to 1,700 m easily. (The actual mountain is higher, but I am not going to climb a ski slope with a road bike )
The pros can place a special order if they need harder gears. On a road bike, I don’t really see the need for anything harder than 50:10 or 54:11, and even the share of athletes for whom this is really necessary seems tiny.
Out of curiosity, what gear are you in and what cadence do you prefer at those speeds?