Earlier quoted context omitted.
XP could be snappy, but I haven't forgotten how poorly my old XP two-thread laptop multitasked, how the battery didn't last more than an hour, and so on. That is a hardware issue. XP can use far more cores, and I bet if you had the drivers, it would run much better than 10 or 11 on a recent laptop and give even better battery life.
>XP can use far more cores Only for the 64-bit version, which was very uncommon for most of the XP lifetime. Almost everybody on XP was using a 32-bit version, which only uses two cores at the most. Using select 2014 PC's which are about the newest you could get that still supported XP and where proper XP drivers were easily available, a lot can still be done to make direct performance comparisons. These would be the…
Where did that misinformation come from? In the late 2000s, quad-core Q6600s were very common at the time and they certainly had all 4 cores active under 32-bit XP.