Earlier quoted context omitted.
Efficiency starts to matter in a near-peer conflict.
Near-peer conflicts have more meaningful targets which favors these kinds of expensive weapons platforms. A drone that can do meaningful damage to a factory 500+ miles from a front line is either an easy target or it starts to look a lot like a missile with all the associated costs from that.
Of course everyone sees this happening in Russia right now and is adapting their next generation, if they weren't already doing so. But that will only shift the sweet-spot for saturation attacks, not eliminating them