I wonder how many are buying now because they want to continue having an Intel Mac for boot camp and legacy applications?
Probably a small contingent. I'm boot camping to play PC games, so I cannot update anymore.
Might be a larger number than you think. Around here the AS threads are filled with posts about needing bootcamp or virtualization for some specialized windows app or as @1rottenapple mentioned gaming. If the 16" didn't have widely reported issues with external monitors I'd buy one today to get rid of my dumpster fire 2017 with 3 keyboard replacements plus having an intel to ride out for a few years with bootcamp.