Computer processing power is what makes or mostly breaks EW. (Computer processing power can also turn a crap sensor into an eagle eye). Off the shelf components will not beat custom components (except at $$$). The Russians can't make the custom specific hardware - this puts them roughly 20 years behind no matter what.
They use to compensate somewhat by being clever but I'll bet all the clever people have defected. My favorite was 10 ns delay? 10 foot circuit lead traced around the outside edge of the circuit board.