Interesting - Ukraine Missiles Use Open Source, Russians Use Pi-4s

https://www.newscientist.com/article/2580002-why-a-ukrainian-cruise-missile-is-flying-with-hobby-drone-hardware/

Ukraine :

Ukraine has developed a cheap cruise missile guided by an
open-source autopilot system typically found in consumer
drones. The use of hobby components highlights the shrinking
gap between military and consumer electronics, which may make
it easier for small countries and non-state actors to develop
powerful high-tech weapons.

One secret of Flamingo’s low cost is its Ardupilot flight
controller, which uses sensor data to keep the missile
flying stably along its assigned path.

Russia :

Waves of Shaheds hit Ukraine every night, and while earlier
versions navigated by satellite, a new “Seeker” version has
a camera and Raspberry Pi 4 processor with AI software to
lock on to targets

. . .

   Bargain sub-basement - but apparently VERY effective.

   Ukraine blasted a gigantic Amazon-scale warehouse
   and oil facility in Moscow last night.

   The new Russian Shaheds, using optical pattern
   recognition, can avoid GPS jamming by Ukraine.

   Meanwhile, everything made in USA costs a million
   dollars per unit and take forever to build.

   Sorry folks, but 'the west' has fallen WAY behind
   the proverbial curve in 21st-century warfare.