Exactly. In the 90s PCs jumped from a few 100MHz to 3GHz in a few years. Now that was impressive. This on the other hand is just plain old evolution of technology.
I'm afraid you're remembering incorrectly. The Pentium 100Mhz was released in 1994. The last Pentium released in 1999 was the PIII 800Mhz. There wasn't a 3GHz release until 2010.
And that's just clock speed. Compare any 2010 chip to something like a Ryzen 5800x and see how the benchmarks scores look.