I never thought I would be a cable riser guys either. Give it a try. Grab some cardboard, as on jars or some glasses out of the cupboard. Glad is an excellent insulator. You can try it for basically nothing.
I heard a small change on a mix of hardwood and a little carpet. Even if it is placebo for $20, I’ll take it 😁
I do wonder how many tweaks can make huge changes in separation, clarity and deepen the soundstage. If they all worked my neighbor would be asking me to get my soundstage out of his yard.
Then again I made cable risers. Have fun and try it if it is free…ish