Thing is that a synth is a sealed package built to do one thing.

With General Purpose Computers, there is a ongoing Jevon's paradox. As hardware improves, software is changed or introduce that gobble up said improvements and then some.

Thus software outpaces hardware to a massive degree.

We can see this in how as time march forward, what used to be done using dedicated chips are done using a GPC and software that emulates the dedicated chips.