They really aren't slow, but the performance and battery life is greatly eclipsed by Apple ARM. I could live pretty comfortably on a Lenovo P51 (something like

They really aren't slow, but the performance and battery life is greatly eclipsed by Apple ARM. I could live pretty comfortably on a Lenovo P51 (something like a 2017 MBP) if I had to under Linux and FreeBSD. Also a not negligible amount of performance was lost by the security gaffes and microcode and OS mitigations for them.