Clearly, reports of the death of the 'tank' are premature because if the threat from precision weapons, drones, or whatever was believed to be that serious, we wouldn't be proposing to put lots of infantry in tank-like targets. We're back to arguing over the function and form of the 'tank', not its right to exist. The new formation brings to mind the c1942 mixed div: 3x inf bdes (mostly armoured infantry) plus 1x 'tank' bde with enough supporting arms/services to allow balanced bde groups. Seems a sensible mix as a starting point. Tradition aside, I can't help feeling that once you've got infantry crewing fighting vehicles you might as well make the the FS/AT 'tank' variant organic to the infantry (dragoons in the original sense?) and essentially solve the cooperation conundrum for all time. It won't make it any easier to define or do but at least a single arm would own the problem. Keep the 'cavalry' for recce/escort roles. It does beg the question: what are 'protected infantry'?