I suppose you mean IVAR, but then I'm surprised as I have practically the whole IVAR assortment, coming mostly from when we had a move at work and renewed furniture there. The wooden racks, wooden cupboards, metal cupboards, I have them all and I love them. They have followed me through multiple house moves as well. They replaced basic pine racks that I got from some hardware store, that were not much cheaper and much less sturdy even though... well I still use them anyway, so I guess they're not so bad.
At one time I turned one IVAR metal cupboard into a growbox for tropical plants (the hollow space at the bottom and the mobile rack inside were pretty handy for running wires, pipes and placing the equipment) and it held very well the humidity, that was about ten years ago, I turned it back into a normal cupboard now and it's still as new. I now use a MILSBO cabinet as my indoor greenhouse.
IVAR is the one where the shelves clip on to little pegs? that used to be metal but now everything is plastic? For me they never clipped strong enough, so a slight bump caused shelves to fly off the pegs, even with the backing straps to keep the whole thing from accordianing down.
Your mention of cubboards might be the thing - you need to build it out around the cupboard instead of trying to just use it for shelves.
Maybe it depends on the country? The shelves in metal IVAR cupboards still use metal clips here in France and Belgium. The shelves for the wooden racks are held by metal brackets and metal bars (I don't use the cupboards mounted to the wooden racks, they are just standing on the ground. I haven't used corner pieces either).
I would expect wire metal shelving to be much cheaper than what you can find at Ikea of course, but also quite flimsy.
Now I'm no Ikea salesman but I always fail to understand what I read on HN (or other US-centric social media sites, as far as I can tell?) when the topic of Ikea comes around.
The wire shelving linked is "kitchen/factory" grade and rated for 650 lbs a shelf, I'd have no issues climbing to the top and jumping up and down on it. I'd be scared to death to do that on a 83" piece of Ikea furniture.
I suppose you mean IVAR, but then I'm surprised as I have practically the whole IVAR assortment, coming mostly from when we had a move at work and renewed furniture there. The wooden racks, wooden cupboards, metal cupboards, I have them all and I love them. They have followed me through multiple house moves as well. They replaced basic pine racks that I got from some hardware store, that were not much cheaper and much less sturdy even though... well I still use them anyway, so I guess they're not so bad.
At one time I turned one IVAR metal cupboard into a growbox for tropical plants (the hollow space at the bottom and the mobile rack inside were pretty handy for running wires, pipes and placing the equipment) and it held very well the humidity, that was about ten years ago, I turned it back into a normal cupboard now and it's still as new. I now use a MILSBO cabinet as my indoor greenhouse.