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Advances in electronics manufacturing are mainly noted for having made incredibly fast computers possible, but today's dirt-cheap microcontrollers are also incredibly fast.

Back in the day, a dirt-cheap microcontroller was something like a PIC16. Doesn't even have a multiply instruction, let alone an FPU.

Dirt-cheap microcontrollers today can run freaking Linux and are fast enough to do *software emulation* of #retrocomputing devices like floppy drives and sound cards.

Neat.