I have compiled some reasons for why I buy no power growth for mainline Sonic, but, I don't think there's much reason to try to present that on VS Battles really. It's nothing against anyone at all, but when you have two people who adamantly believe they are correct, and have directly opposing beliefs, it can feel like two walls just pressing and budging against each other, if that makes sense. Some here very strongly believe there is power growth, and I'm immensely confident there is none. If that were to be presented, it would sort of just be a discussion that only goes in circles.
Again though, this isn't aimed towards anyone at all, but I've been thinking on this for over a year or two honestly, and I wanted to drop my thought here.