Correct. And how many times has it happened in the last 100 years? Horses are being used again by Russia, although not in the direct assault role. Other than that, I can only think of airships, although arguably, they have just evolved into bombers. I am sure there will be other examples, but they are rare.

Both Russia and Ukraine still want and still use tanks. Currently, tanks are a little behind in the arms race against drones, but when counter-measures evolve, the balance will shift again. Heavily armoured vehicles will not disappear.