[PlasmaKrab]

So you cannot have at the same time an air-transportable and notably-armored track on the ground, right?

I know it would just take, what, 30 minutes with the crew and a 2-ton field crane to get the armour on, but that can be the 30 minutes between life and death in case of a hot airdrop on, say, an occupied airstrip.
Notionally even better than not being able to fit any uparmouring at all, if you ask me.

It all goes with different doctrines anyway, so yes, why not give it a try for a fully light-armored-standoff force?

As for "modular airtransportable" armor or whatever, it boils down to the decades-old C-130 requirement. If countries are willing to put up deployable forces, then where is the long-range, heavy-load, heavy-duty plane for them? I'll have to check the specs on the A400M, and the An-70 and An-74 could also be worth a look.