#but splitting into paleogene and neogene is already largely enough

[quark-nova]

I get that complex life had a way faster rate of morphological evolution and that it makes sense to subdivide the Phanerozoic (and Ediacaran. Please split the Ediacaran at Gaskiers) in smaller periods than the Proterozoic.

But like. Evolution wasn't magically faster in the Cenozoic than the Paleozoic. Now, the amount of species was higher, but that's because of fragmented post-Pangea habitats and flowering plants offering more specific ecological niches. Still, stuff wasn't happening faster, and subdividing the late Cenozoic in absurdly small amounts doesn't reflect the actual rate of "stuff happening".