I imagine SPAAG's are going to make a come back as militaries wrestle with how to best defeat drones and micro drones. Probably going to see combo SPAAG / Missile / ECM platforms.
Drones can fly between trees and buildings, even inside buildings. Dedicated vehciles would too rarely be in a position to intercept.
I rather expect RCWS (remote controlled weapon stations) with 5.56 to 20 mm calibre gun and a +90°/-15° x 360° field of fire with 24/7 useful sensor and laser rangefinder.
The 12.7 to 20 mm guns would also be relevant against helicopters.
Software-based radios CAN be programmed to serve as jammers. Vehicle-mounted radars could thus be linked to a simple (Yagi) directional antenna mounted on the RCWS and directed at drones. This antenna could jam (particularly if several vehicles are doing this at the same time) the radio downlink of the drone IF the drone's radio link is covered by the range of bandwidths of the vehicle radios.
Cheap missiles like RBS-23 (likely too simple to defeat high end combat aircraft) can serve as battleield ShoRAD against expensive munitions (cruise missiles, ATACMS-like missiles, drones above 5,000 ft)), while expensive missiles (vertically launched air combat missile derivatives such as AIM-120, Meteor, MICA, IRIS-T SL etc) may serve as air defence against high end platforms.
At the lowest end small arms (possibly including shotguns) and nets (particularly for bivouac) may serve as defence againt sparrow bird-sized micro drones.
Autonomous small bird-like drones with EFP warhead and days of endurance could become a terrible threat to the troops (and the tires + other exposed important components of vehicles).