Every so often (since at least the 1970s) people start talking about how the tank is no longer useful because of how deadly shoulder fired rockets have become. The below shows how much effort it takes for a relatively well equipped group of light infantry to destroy one single Russian infantry fighting vehicle (not even a real tank).

You can see why both of the combatants still want more and more armored vehicles. Yes they can be taken out with shoulder fires missiles but it is no walk in the park. Imagine if the BMP in the above video has been supported by 3 other BMPs and an aggressive complement of infantry. It is the Russian tactic of using them in drips and drabs and not supporting them well that gets so many of them destroyed.

Below is footage of them advancing on the now dysfunctional opponent.