This is assuming you have this "one big cliff mesh". This is the Nanite mindset: Just let the artists throw anything that comes out of their DCC at it. That is

This is assuming you have this "one big cliff mesh". This is the Nanite mindset: Just let the artists throw anything that comes out of their DCC at it. That is a great value proposition for studios, especially the ones that fail the marriage of art and engineering. It's a bad value proposition for end-users. Nanite is much slower for the same image quality that a bespoke solution would offer, which is evident with several AAA titles that choose to use in-house tech over UE.