

Interesting question.
I think not, on the grand scale. Whilst yes, it would vastly outclass other tanks, you’re forgetting about the adaptability and inventiveness of humans. I believe they would find a way to disable it fairly quickly - after all, WW2 was a constant stream of one fighting unit encountering new technology - Allies had nothing like the German Railgun for example, but it had little influence in the outcome. Also, like the Tirpiz, something like this could become a liability. It would become such a target that it would tie up a huge amount of resources protecting it. Modern tanks are still vulnerable in many ways - even from as simple a thing as just digging a hole in the ground and covering it with branches caveman style.
Yes, absolutely. Good point.