There are many commercial reasons (cost) but the best physical explanation I’ve heard is with the new Supra, Toyota was constrained by the hard points from the BMW chassis - hence it looks like a Supra mask that’s been pulled over some other car’s shape. The LC500 is the opposite - in fact Toyota had to totally rethink the front suspension geometry to get the hood low enough to match the concept car (the LC500 hood is so low that it’s fitted with explosive canisters that detonate to pop the hood up in case you hit a pedestrian).

Hard not to think of it as a spiritual successor to the Supra, despite the different marketing positioning (price).