M60 with unmanned turret and upgraded mobility will be a new tank, with costs of a new tank, but still with an old hull. Furthermore, placing cockerill/striker turret won't make an Armata out of it.
There are much more reasonable options with Taiwanese current fleet of m60s, and they already pursue them. As i told before, they are not in Turkish situation, where pooring much more money into already expensive M60T fleet is simply the best path availible.(yes, better than their leopards)
70+t is weight for city fighting/COIN setup. In cities, this weight won't be a problem.Otherwise, Abrams isn't as heavy. Both will be limited, and i honestly think what Patton will be limited much more severely.