Blog engines are a subset of CMSs. They're supposed to be restrictive - that simplicity is part of their value. If they wanted a CMS that would allow them to add their own types of content, they should have gone with a CMS that was more "framework" than "application"
That's what I was thinking, especially when I read this part:
"The CMS has to be everything to everybody. Wordpress has to optimize for both the cat-picture faithful and the ring-bejewled, hair-fisted mogul. Moveable Type has to work whether you are running a lad mag or poetry journal. This is an impossible proposition."
Expecting every (?) CMS to be the end-all solution to every possible content situation is ridiculous. It would be nice/neat but that doesn't seem to be quite how it works—is that idea akin to expecting every vehicle to be able to perform every type of situation available? Expecting your family sedan to also be the workhorse carrying materials and whatnot?
What if you only wanted to ride a simple bicycle down the street and not have to worry about a more intricate/heavy one? I use different CMS for different things though admittedly, that makes it harder to master one in particular.
I do feel as if CMS have kind of stagnated for a bit and am a little tired of most so I'm thankful for the author bringing Netsta to my attention—it looks interesting.