Can NetBSD now utilize more than 1 processor core ?
I'm wondering if it's a sarcastic comment in the style of the 'BSD is dead' meme.
You seem to confuse SMP with Intel's "HyperThreading", which is disabled on OpenBSD due to security concerns (SPECTRE et al.) and which makes sense to default to in an OS that takes security seriously.
SMP and HyperThreading are completely different things.