Engineering NetBSD 9.0 [pdf]

Is there a good comparison of today's state of NetBSD vs. OpenBSD vs. FreeBSD? Is NetBSD still the most portable OS?

Interesting. Reminds me I have an MVME machine or two and an SH4 running older (7.x maybe) NetBSD that I should upgrade since 9.0 apparently supports them.

The abstract in this is really great, a full lineage of the product going back to 1965. Yet short and concise. Beautiful!

Section 5 would be better with a laundry listing of at least three unrelated sources observing a security audit at sourceware and runtime level.