Seems like people forget that feats are an optional rule and not assumed to be in every table by default. However, I wonder if the number of tables using D&D Beyond use more feats and multiclassing than those that don't. Of course, that's just speculation without data but it would not surprise me.During one of Mike Mearls' sub-class building streams he was asked why he doesn't just include some options as feats. His response was that less than half of all tables use feats.
I bet multiclassing is even less than that.
We have what, over 20 million 5e players now?
I agree with the others saying to take these stats with a high degree of skepticism.
It's easy to not be exposed to all the people who play differently.