Nato has had advanced drone capabilities for a long time now, but was mainly focused on stealth and reusability rather than mass production. I know drone swarms to accompany stealth fighters and navy ships have been in development for some years now, but the mass use of disposable drones is not something there was a real need for. But I have no doubt that modern infantry training will start including drone usage and tactics, if that isn’t the case already.
Wouldn’t that be covered by warranty though? 3 months is a pretty short period.