You forgot laser defense systems and optic fibre drones.

Safeguarding critical assets with unwavering precision at the speed of light
http://eos-aus.com/defence/high-energy-laser-weapon/apollo/

Ask this question:

“Can ASEAN make its military forces, critical infrastructure and maritime commerce resilient enough that cheap drones cannot impose strategic costs vastly greater than their purchase price?”

ATM that answer looks like a resounding no: This is obviously a universal problem applicable to friend and foe; Israel, for example, is struggling with this exact issue against the ragtag Hezbollah with mixed results.