How important is the rack you use for your components


I’ve been browsing thru people’s systems on audiogon and have seen all different kinds of racks, shelves, bookcases , stands etc. For people’s equipment. My question is how important is the rack to the sound of the system. Has anyone gone from a basic rack to a premium and/or home constructed rack and noticed a marked improvement? And when I say marked, I mean marked. Looking for input
polkalover
I built a table and matching floor amp stand out of mdf. The thickness is 2.75” and trimmed in stained poplar. Have read here that this type of setup may actually overdampen the equipment. My pre and cdp (on maple board) rest on brass footers. All seems to work ok and looks presentable for a definite novice.
Any rack is capable of perfect sound.  Just go to the hardware store and get foam weather stripping and isolate the components from the rack frame.  God there's so much idiotic nonsense around here.