Sure you can’t actually attach your rackmount stuff to the sides but can you really on the Lack Rack anyways?
Pros? Just as cheap. 4 legs = $20. Each shelf = $10. Yes, you can get a Lack for $10 or less but you get zero shelves with that. If you want “shelves”, those IKEA towel bars cost $5 a set and they can only hold very light weights. Also, you’ll need to reinforce the hollow legs with 2x2s, glue, etc…all of which adds to the cost. Metro racks are just that. $20 to start. $10 per shelf. All hardware included.
No fuss. I looked at the prospect of gluing 2x2 in the LACK and then returned my IKEA stuff immediately. A wire shelf took me about 5 minutes to build. It’s easier to build than IKEA furniture.
Strength. Now…I’ve stood on a Lack and it didn’t break but that being said, the whole thing is hollow and I don’t know if I want to put my 100lbs+ server (with 15 HDs, it’s easily that heavy I’m sure) on it. A wire rack holds at least 400lbs per shelf without breaking a sweat. Mine is “rated” for 800lbs.
Admittedly it doesn’t look as nice as a Lack Rack but the wire shelving gives you a lot more modularity and modability. I have a pegboard on one side with my modem and Edgerouter-X attached with velcro straps. I’ve used the same straps to attach some tubing as a sort of guide for cable management.
I haven’t managed to find a real rack for free or very little yet but until I find it, I think this is a better option than a Lack Rack. Also, for the day I move all this to a real rack, this wire selving will still be super useful as actual kitchen or garage shelving while…you’ve definitely ruined those Lack tables.