Ukraine is proving that the "big bombs" are useless - fpv drones can and do take out tanks, planes and ships. They don't survive long enough to deliver the "big bombs".
Russia is currently reduced to sending in unmechanised light infantry to try and take ground because everything larger doesn't survive (and the light infantry apparently survive for only 20 minutes on average). Russia's Black Sea fleet cowers in port under its anti-air defences and even then takes losses. Their long-range bombers are not being used in the long-range bombing of Ukraine's civilians, that's all down to cruise missiles, because they're too valuable to lose (and a lot of them have been destroyed on the runway by drones).
The age of WW2-era mechanised warfare is gone. It's as obsolete as the cavalry that came before it.