I know they needed torque. And, yes, turbo 4 makes it easy to fit into various applications, but IMO V6 would be better for CX9 etc. As for Toyota, as long as they skip 90% of vehicle, it might be actually good!
It used to have the 3.7 V6 from the Ford days but the 2.5 turbo has pretty comparable numbers so it’s not needed.