A heavy chunk of armour with a gun and optics that can hit a gnat at 2500 m is far from obsolete. However, combined arms warfare has quite recently seen the introduction of small drones as a branch in itself. These will require dedicated counter-measures just like any other facet of combined arms.

Man portable anti-tank weapons didn’t make the tank obsolete. They made it clear that tanks needed reactive armor, active protection systems like TROPHY, and supporting units that prevented infantry from shoot-n-scoot’ing from places the tank can’t see. Aircraft didn’t make the tank obsolete either, even though an attack helicopter can absolutely wreck a tank column. They just made it clear that any mobile armoured unit needs sufficient air cover. The same is true for small drones: Today, there are very few effective counter-measures available, which makes any tactic other than “hide underground” seem obsolete. However, counter-measures like the PROTECTOR are likely to become more commonplace, and once the tanks move together with those, they won’t be as easily countered by small drones anymore.