But note that the size of the capacitors isn't just a question of technology.

A HC chip can draw less current than an old LS chip. The steady-state logic current is practically zero - they are voltage-driven instead of current-driven.

But if you look at buffer chips, it doesn't matter so much that the current on the inputs are greatly reduced. If it is used to drive a heavy load, the buffer chip itself will still be a big current consumer.

Same with a microcontroller. The core will draw less and less (unless the frequency is significantly stepped up). But many microcontrollers will have a significant amount of the power consumption controlled by what is connected to the GPIO signals.