You still need firepower to help move the wedge forward, and lots of it. And nothing has been able to replace a dart flying at Mach 5 or a 120mm HE round being fired at Mach 4. And best way to carry the gun that can fire these at those speeds is a tracked vehicle, and you want it armored so that it's not out of action in day one.
I'm a big fan of AMX-10RC and it gives France a great capability in deploying firepower against light armored groups in Sahel. They sent them to Ukraine with months of training. During the counteroffensive, all the downsides of it not being an actual tank came forward. Gun without stabilization, lack of armor protection where even artillery shrapnel caused catastrophic loss of hull. Now they are purely used at the back as a fire support vehicle, because they failed greatly at armor push.
Composite armor, slat armor, APS. They are all protection, hence armor.
Everyone have ideas on how the tank is obsolete, but noone have been able to give it a good idea for a replacement. Because modern MBT is already a compromise on speed, firepower and armor. It's fast, has great firepower and very good armor. You can move these 3 sliders a bit to one direction, but you'll always lose on other sliders. No other upcoming design changes the MBT concept, just modifies it.