I’m not talking about high tech but changes in configuration of the technology. Miniaturization brings a whole new level of hardness to electronics. EMP effectiveness has changed wrt to the things you are stating/citing. EMP effects can be expanded by number of weapons used, configuration of munition(s) and method of deployment. Precision deployment methods are growing in leaps and bounds.
Small electronics packages are surely easier to protect. I'd assume that obviating the need for inductors helped a great deal as well, that being accomplished by RC parts being used with op amps rather than coils for tuning.