v3llum
V3LLUM
v3llum

I think he might have been talking about normally aspirated engines. those (especially modern ones) don’t leave much on the table for a tune to improve; you basically can move the powerband around a tiny bit. A little more so if you have control over the cam timing.

You didn’t mention the area where it has huge benefits. When you tune a forced induction engine you will tune it for more boost pressure typically. This is usually done specifically for premium gasoline. A tune designed for 93 octane, and in some cases 25-50% more boost will have a very significant increase on engine