> "parasitic gate capacitance" - not sure if you want to call it "parasitic", after all, a gate capacitance is what makes everything work!

Of course, but the 'ideal' FET has zero gate capacitance, despite that being the way they work.

> Power is mainly lost via leakage (the smaller the transistor, the more it leaks), and via interconnect capacitance, which dominates all other capacitances in modern circuits.

Interconnect meaning things like the buses? There's no reason to want a von Neumann architecture for an analog chip. If that leaves leakage, I suppose an analog chip would be the beneficiary of needing a lot fewer transistors per op.