I agree that regular flights would of been expensive but I was thinking of a one time operation of a long range unmanned drone carrying more ordinance than Ghost Bat at more than twice the speed of , I would hope that future aircraft are not crushed and buriedI'm pretty sure they were ridiculously expensive to keep in service by the end.
They required a huge number of maintenance hours per flight hour compared to pretty much any other aircraft. It would have been cost prohibitive to return them to service after any length of time even in fully climate controlled storage.
China Converts Soviet MiG-19 J-6 Jets Into Drone Swarms - Telegraph.com
China is reviving thousands of Soviet-era J-6 fighters, converting them into pilotless drones built for swarm attacks that could overwhelm Taiwan’s defenses.
telegraph.com