They continue to add transistors to newer processors. It is a good sign that someone keeps track of them and writes documentation on how to use all these new transistors.
I heard they added a couple of transistors to the latest Intel chips. One of the transistors hasn't been documented yet, though, which is unlike Intel.
I'm imagining the documentation for an individual transistor that extends all the way up the stack... and thinking about Escher for some reason.
This makes me wonder how many undocumented transistors are on the chips -- there because nobody knows why.
Apparently Nvidia had to drop VBIOS a bit early because it started having issues but they no longer had enough people who knew how it worked to continue supporting the feature.