It's very similar to what brought down knights on the battlefield(cheaper massed gunfire defeated plate armor), although the result for the next few centuries f

It's very similar to what brought down knights on the battlefield(cheaper massed gunfire defeated plate armor), although the result for the next few centuries favored substituting lighter cavalry forces, right up until the World Wars brought the tank in as the new knight. Tanks won't disappear immediately - there's still justifications to have something in the role, perhaps with adjustments to the details - but it has to be part of a combined arms doctrine. The key element in these tank kills is lack of support. Russia has long been thought to be behind on modern doctrine and the performance to date in Ukraine drives this home: in an environment that demands high levels of force coordination and expensive gadgets, a cannon fodder offensive creates extremely high attrition, and the demographics and economy of Russia today aren't as favorable to absorbing this as in the past(older, fewer young men to lose, dependencies on the rest of the world to rearm).