Lightly modified FPVs with grenades are a major concern for soldiers, but so are mortars and artillery shells etc. There’s a lot of low cost long range weapons vs infantry, but a drone with a grenade isn’t really effective vs tanks etc. A fleet of cheap drones just don’t do anything if bomber aircraft can simply fly higher than they can reach.
Leave the realm of mass production and you can build drones that would be, but they quickly start looking like existing systems because militaries have been working with drones since WWII.
> but a drone with a grenade isn’t really effective vs tanks
You may be thinking of AP grenades, but broadly speaking this isn't true. UA has been dropping RKG-3 anti-tank grenades since early in the invasion. Any drone with a 3 pound lift capacity can knock out armor.
Can a RKG-3 in the right situation knock out some armor, definitely. But they don’t seem to be that effective vs amor designed to deal with shaped charges such as you’d see with a peer adversary.
Those shaped charges weren’t envisioned coming from directly above, especially precisely dropped on the engine or on hatches, hence the drones are hitting spots with little to no armour compared to the front and sides.
The Bofors RBS 56 BILL (1988), FGM-148 Javelin and similar missile systems exploited weak top armor long enough ago to result in changes to modern tank designs.
The KF51 Panther revealed 2022 should represent the current state of the art. comprising a hard-kill element of extending the coverage of the ADS to the roof of the vehicle for protection against ATGMs and unguided anti-tank rockets launched from higher elevations, as well as a soft-kill element for protection against threats such as loitering munitions.[4]https://en.wikipedia.org/wiki/Panther_KF51
Obviously getting 100% accurate information on current tank armor isn’t realistic but at minimum these drones aren’t breaking new ground.
Leave the realm of mass production and you can build drones that would be, but they quickly start looking like existing systems because militaries have been working with drones since WWII.