The finger jointed pine stuff is much more robust than the mdf or hardboard products.

IKEA does stuff not out of MDF and cardboard?

In case you're not just being sarcastic, stuff like Ivar.

https://www.ikea.com/us/en/p/ivar-cabinet-pine-40033763/

yes, the lingonberry drink they serve in the cafeteria. :)

actually they had some metal garage shelves that I thought would be ok.

They turned out to be SUPER flimsy and wobbly.

I think they optimize for shipping weight, which means 'solid' suffers.