Well no i can’t *because* there are no fast opening switches. In small scale well yea, every switch mode power supply uses inductors and the main energy store which makes them far more compact than a transformer/ripple cap combination. But the physics is straight forward and power density is pretty good compared to caps. Current at the MA level is a little more challenging without superconductors. But then MA is not trivial with caps either.
But if you can get a solid state switch with high current and high standoff. There is a strong case to use magnetic storage rather than caps.
