Frag grenades work just fine and don't require a pin and password to operate it.....lol
I cant speak for every unit in the Army, but not all of them depend totally on technology to shoot, move, and communicate.
The high tech stuff may make for a better news story, but it hasn't replaced boots on the ground as of yet.
FWIW..... The rifle I was using on my last excursion overseas was built in 1963, and it worked just as well....optics or not.
With that said, I don't mind it at all when a USAF J-TAC calls in a fast mover to deliver high tech destruction upon an enemy we have managed to fix in place.
Until they make a "Terminator" to replace us, we still have job security in the Infantry.....lol