As far as I can tell, a lot of the more recent IKEA stuff we've bought is using that "wooden oatmeal cookie"[1] and honeycomb cardboard junk. I think some commenters are underestimating how much their materials have changed.
We've even have an older version of a shelf unit that is nice, solid pine, and gone and bought the current version and the current version has changed to that wooden oatmeal cookie[1] crap.
Glue does still help, though.
1. Great term, so fitting! I'm stealing it.