That's the point exactly....
Fets that handle 1 to 2kw are nothing too new, they've been around a few years.
But most of them cost over $1k each
Not exactly "experimenter's devices"
Right, and a slight mistake in the circuit buildup and those nice little kilobuck doodads let off a flash like a Romulun disrupter haha.
Buck a watt for a delicate fet or 40 cents a watt for a durable toob. hmmmm (20 cents a watt on the bigger toobs)