their previous April Fools joke (https://www.netgate.com/blog/building-a-behemoth-router) actually said "Happy April Fool's Day" at the end. This doesn't. It's a poor attempt at a joke if it is one.

Yeah, I think this is a joke, but only because it's a big change announced on April 1; it reads pretty serious. Especially the part about how TrueNAS already made the switch - that was my first though on seeing the headline.