I second this but it's not even about being the best of humans. At least 90% of amateur cyclists are out of my league and yet I insist to go cycling, because I like it.
That said, maybe the appeal that's remained since has been relatively stable overall, but locally it varies a lot depending on the cycling infrastructure that's available. More people ride when they feel safe doing so.
A steam locomotive was claimed to go 112 mph in 1893, during the craze for "safety bicycles".
Even as early as 1829, a steam locomotive went almost 30 mph.