Depends on how well integrated and power gated those "Unnecessary" features are - it may be of functionally zero cost when running the "same" use case, while al

Depends on how well integrated and power gated those "Unnecessary" features are - it may be of functionally zero cost when running the "same" use case, while allowing significant improvements in newly-accelerated use cases. If it's loosely integrated (e.g. doesn't need super high bus access) it's not even as if it'll affect stuff like the clock tree or bus complexity much either.