A more basic issue is when realize just how much such a large vehicle is going to cost to buy and operate and support in battle, and see that a MANPADS has more range and is fire and forget and can be fired by two guys with a jeep, any real advantage of firing a 76mm shell becomes very small. The radar guidance system makes it harder to counter electronically, but you pay a small fortune for it at the same time.
The C-RAM role is far more appealing because at that point cost issues are less relevant, the entire goalis to spend a small fortune to save people, and the much higher number of engagements before reloading makes shellfire much more favorable then any existing missile system could be. The ongoing US Army EAPS program actually considered that automatic 75mm gun developed for the RDF light tank, before settling on a twin 50mm as its gun solution, being designed alongside a very small radar guided missile which I believe was test fired not long ago. Main downside of the RDF 75mm was that while automatic, it was only about 40rpm and judged not worth the trouble of improving upon.