The military pays attention to it, it is one reason our field radios weighed so much.
I think the weight had a lot more to do with being sturdy enough to handle field ops versus EMP. EMP protection wouldn’t require much at all. The military protected its devices much more against TEMPEST rather than EMP. EMP is too weak a pulse to bother individual devices.
I participate in several EMP hardness programs while in the USAF. Additional emphasis was also placed on programs to reduce succeptability to EMI.