I find it more ridiculous to assume that the development team decided to nerf a single items recycling time, almost 2 years after release for no apparent reason.
They could have removed hazard concrete as a separate item.
They could have (and should have by the same logic) done something about chest-based recycling.
At least half the forum is crying about them removing space-casinos daily.
This is one way to reliably get a reasonable amount of quality iron in the early game, without megabasing.
I am generally very open about the fact that I could be wrong; I could be, I very well might be.
Nerfing concrete for no apparent reason seems maximally ridiculous to me and I would rather assume a reality where otherwise very competent people do things for a reason. Call me naive, if you like.

