[redpoint5]

I like the unconventional thinking.

My thought is they would have implemented such a system with fuel tanks if the benefits outweighed the costs.

Packaging is extremely important in vehicle design, so no volume is wasted. That means no dead spaces where weight can actively shift.

The main issue is that it's not needed. By my observation, 90% of drivers are afraid to take a corner fast enough to even feel lateral G forces (the bane of my existence). If people are already too uncomfortable to drive their vehicles anywhere approaching the limits, why would they value a higher performing vehicle?

Active suspension has more versatility because it can deal with shifting CG as well as uneven terrain.

A moving battery introduces safety and reliability challenges. If it can move, then how will it survive in a collision vs being rigidly contained. How about the stress of the wires and coolant hoses that must articulate to accommodate the battery position.

Finally, it would be tricky to implement as the shifts need to occur prior to cornering. If the shift occurs during cornering it simply places more force on the tires.