system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If CPU speed is improving, why have clock speeds not increased all that much in years?
gpt
Rephrasing the question, "if clock speeds have not increased all that much in years, how is CPU speed improving?"

Imagine you own a warehouse that ships koalas from New York to Philadelphia.  These are the finest koalas and absolutely MUST be delivered as quickly as possible.  You buy a truck and send it to make your koala delivery.

Over time, you want your deliveries to get there faster, so you switch to a much faster truck.  This happens every year, until you run into a big problem.  Your truck is getting speeding tickets!  This means the driver has to pull over to the side of the road and he ends up losing time while he receives his ticket.

The solution?  MORE TRUCKS!  Now you've got 4 trucks carrying your precious koalas instead of 1.  They can't go any faster than the speed limit or they'll get pulled over, but you can ship way more koalas this way.

The trucks are processor cores.  Eventually, you run into the speed limit (heat).  Go over the speed limit, and you get pulled over (overheat).  When you switch to 4 trucks (cores), they're not individually faster, but can carry WAY more koalas in the same span of time you used to by only using 1.