My understanding is that wine matures slower at low temperatures, which is said to be a good thing. Thus variation to a warmer temperature would mean wine matures faster, thus its a bad thing.
Are you saying that variation by itself is not bad or that warmer temperatures aren’t detrimental?
We take so much about wine from books and experts that it is good to test the ‘common knowledge’.
(I recall Nick Alabaster doing a 5 year trial of corks comparing a case of the same wines with half standing upright, half on their sides. Conclusion, no problem standing upright for 5 years)