Btw., even the Wikipedia article contains a nice explanation of what I&#x27;m talking about (and, yes, I&#x27;m of the Landau-Kapitsa-Okun school of thought, naturally): <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Mass_in_special_relativity#Controversy" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Mass_in_special_relativity#Con...</a>