
#DRAM is one of those machines that sounds way too simple and stupid to be practical.
You have a bunch of capacitors. If a capacitor is charged, it's a 1, otherwise it's a 0. Every once in a while, recharge the 1s so they don't become 0s.
It's the sort of thing a little kid would think of.
And yet, it works perfectly and is the gold standard of volatile #RAM. (#SRAM is quicker and more sophisticated but less dense and more expensive.)
#Technology is funny like that.