system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How did we get to the moon with computers so weak compared to today

My guess is it has something to do with the fact that computers today need more power to run graphical interfaces, but thats about where my computer knowledge ends.
gpt
A few reasons.

First, much of the electronics of the early space programs were analog, like old timey radios with a dial you could twist, or a cheapo washing machine.  That kind of electronics doesn't need much computational power.

Second, space travel didn't actually require a lot of advanced computation.  Oxygen level detection doesn't need a fancy computer.  Orbital calculations were pre-programmed, not calculated on the fly.  Radios were analog.  Control systems were the main digital component, and they were simple.

Third, complex systems are often more prone to failure.  Better to have (it was thought) well trained humans that could use brain power to actuate simpler systems, than have complex computers running everything.  Remember, every electrical connection has a chance of coming loose during the vibration of lift off.

Consider a modern space game.  That game might need to keep track of the position of thousands of objects, and millions of polygons.  The Apollo missions needed to keep track of **one single object**, the spacecraft itself.