In 2003, Apple released a 64-bit dual-core 1.8Ghz system: Power Mac G5.

In 2023, Apple released a 64-bit dual-core 1.8Ghz system: Apple Watch Series 9.

The Watch is faster and has more RAM.

The G5 was too hot to put in a laptop. It'd use up S9's battery in under 2 minutes.

@kornel @stroughtonsmith and 21 years before the G5, the ZX Spectrum came out with a 3.5 MHz Z80, an 8-color display and either 16 or 48 kilobytes of RAM. I'd say Moore's Law dramatically slowed (especially for single-core performance) around the time the G5 came out.
@Alphacheez Moore’s law is about transistor count per cost. Nothing to do with clock speed, and only indirectly with performance. (That said, it _has_ slowed.)