Admittedly, I am no expert, but I did a little testing and the wood iron and stone pillars are fairly even in stability. The wood iron were one color level more stable than the stone pillars at around 6 blocks high (dark yellow vs. orange). Honestly, that kinda makes them a waste of iron in my mind. Sure, they are like, 1/8th the width of the stone pillars and might be mildly more aesthetically pleasing, but I don't really ever see a stone building needing to be over 6 pillars high. And if I want a structure to be taller than that, I can just swap to wood for the next floor or two. The fact that wood iron pillars immediately turn green when build on stable flooring, just like stone pillars, puts a real damper on their potential.

I kinda feel like this warrants wood iron poles to receive a buff so they are maybe 2 color levels more stable at the same height rather than only 1. IDK. I just feel like using precious iron should be more beneficial. It could also be possible that there are more stable pillar types in the game that I have not encountered yet (or ones planned in future updates).

What do y'all think? Am I crazy? Do I have a point? Am I doing something wrong during construction?

EDIT: I also, think, though I have not tested it yet, that Core Wood is also more stable than stone at the same height. That means wood iron is in even greater need of a buff it it actually IS on a level with core wood poles, but, again, I haven't tested that yet in a controlled environment.