It was a good demonstration of the blitzkrieg tactic. Hitting hard and fast with aircraft, tanks and troop carriers without giving the enemy time to regroup or resupply. By the time the French knew what was happening it was too late to mobilize.
The tactic couldn’t be counted until the opposing side had enough firepower to stall it which would’ve taken too long and by that time defeat is a guarantee.
Soviets were given tanks, aircraft, factories, everything they needed to counter the Germans later in the war which halted their army and that’s when the blitzkrieg fell apart.
Blitzkrieg is effective but only when your moving faster than the enemy can regroup and counter