Oddly enough, that convention isn’t universal. Top-to-bottom is typical in the US, UK, and Commonwealth, while bottom-to-top is common in continental Europe and non-anglophone Americas.

I feel like you may have misunderstood the article. It’s talking about how support is increasing for dedicated Copy keys, and that programmable keyboards make it easy to use dedicated Copy keys. The article does not mention changing the behaviour of Ctrl-C.