It's always been that way. Even when I had a maxed out current-gen Mac Pro in 2008, it still launched and ran faster in Windows than MacOS. I have seen people

It's always been that way. Even when I had a maxed out current-gen Mac Pro in 2008, it still launched and ran faster in Windows than MacOS. I have seen people suggesting that it's because of app signature checks choking on Internet slowness, but 1. those are cached, so the second run should be faster, and in non-networked instances the speed is unchanged, and 2. I don't believe those were even implemented back in 2002 when I got my iMac G4, and it was likewise far quicker in Linux than in OS X. At the time (2002), I joked that it was because the computer was running two operating systems at once: NeXTSTEP and FreeBSD.