How did Russia move from experimenting with jet-powered attack drones to reportedly producing around 3,000 Geran-4 and Geran-5 systems every month?

Russia has recently intensified its use of Geran-4 and Geran-5 systems against Kyiv, at times employing around 100 jet-powered long-range weapons while conducting launches throughout the day. - IVAN KHOMENKO

A previously reported Russian production plan for 2026 called for 60,000 long-range drones alongside another 50,000 decoy targets...
Underscoring the scale of this aerial campaign, Ukrainian President Volodymyr Zelenskyy had previously reported that Russia launched nearly 1,500 drones—including 800 jet-powered UAVs—in just four days at the end of August...