Zen 5 has 8.3 billion transistors in a chiplet, Zen 1 had 4.8 billion per chiplet. If we add on some more to compensate for the separate I/O die then we're looking at basically one doubling over several generations and 7 years.
There's still significant gains to be had, but the exponential growth is really petering out.
No it isn't. We are going more parallel and the transistor counts will continue to rise.