It seems that the most effective "drone defense" thusfar has been "moving in small groups or individually, at night or in bad weather, and then hiding in a basement until there's enough people / supplies to push further".
It's clear that armoured vehicle design needs to change. But hangar/turtle tanks hardly seem a durable approach either (even in Ukraine their use has fallen off). I'm still very much a believer in hybrid armoured vehicles, where you have a battery pack with several dozen km of range, and one or more generators powering it.
From a direct survivability perspective, if you use a non-flammable li-ion chemistry (there are plenty, it just means sacrificing some energy density - still requires managed venting / air control systems, however) and have cells in parallel connected by multiple busses, spread out across the vehicle's footprint, it becomes almost impossible to take out the entire power supply, just individual cells. Likewise, since electric motors are compact, you can have 1-2 motors on each axle, and again it becomes almost impossible for a drone to get a mobility kill that way (reducing approaches only to trying to disable the tracks themselves). If they take out the generator/generators, the vehicle still has its electric power to fall back on, and while it's not going to be making some deep push anymore, it can still keep fighting, and retreat when needed.
From an indirect survivability perspective, you have the ability to advance silently when needed (no engine noise, greatly reduced thermal signature), and since modern batteries have so much power density, you have the ability to have a higher top speed, which has proven critical for safety in drone-dense environments. You also have a lot of electrical power, for drone-detecting radars, drone jammers, anti-drone weaponry (lasers, microwave, etc), and so forth.
The mass and volume of the battery pack (we're talking maybe ~250kWh for a rugged heavy armoured offroad tracked vehicle, ~60kWh that for a lighter-armoured road-optimized vehicle) isn't wasted. Cell cans are steel, and between the inner plate and outer armour you're basically forming a honeycomb structure (good for dissipating shocks and spray) with a lot of thermal capacity (cells are organics, e.g. generally high specific heats). With a proper design, you might even be able to get it to function as non-explosive reactive armour. Specifically, contrary to misconceptions that NERA requires elasticity, NERA works instead by a vapor pressure-bulging effect: the interlayer vaporizes and expands violently outward, causing bending of the metal plates it's sandwiched between, so the incoming metal jet is constantly hitting a different location as the bending progresses. NERA normally uses, but does not in any way require, elastomers for this role, simply because they're easiest to package between metal layers, but a properly engineered battery pack should be able to serve the same role. In NERA, you want as much gas pressure generated as rapidly as possible; the copper plasma jet effectively instantly converts e.g. ethylene carbonate, graphite, etc to gaseous CO2, H2O, etc (plus vaporized metals along with the vaporized steel). The keys that matters are that cells that (A) cells that are in parallel are distributed throughout the footprint of the vehicle (not concentrated in a single location), (B) shared buses create multiple distinct parallel paths between the cells within a given parallel group, and to the next series group; and (C) (required for any NERA) that generated gases are properly vented / handled.
A number of next-generation armoured vehicle designs are pursuing hybrid propulsion.
