Does raising speaker cables off the floor really make a big difference?

Cable risers are, in general, too low.

They should be high enough for vacuum cleaner/mop to slide under. Convenience with floor hygiene is their most coveted value.

"...never bothering to see if anything they’re saying is actually true."

It is not.

Was there a writer's strike?

But you might want to stop, if only for a second, and imagine how you look to actual real normal people.

Ah well
We do not need worry what you think then eh Miller......

I tried some purple and pink hemp rope spun together. Then today suspended from the ceiling with a 20 pound spring from a 28 ton Crosby shackle. I hung a 3’ 3/8” wire  rope sling also from the shackle. Dissimilar items so high and low frequencies can be adjusted with length of each. I wrapped the hemp around the wire rope sling at a rate of 3-1. 9 wraps for every 1 foot of length. Put the tail through the eyelet. Tied the rope to the wire suspending the wire at 1 3/64th above the hardwood... I also laid a 3” strip of carpet under the wire to prevent any resonances from the hardwood. And I have to tell you. It’s been the biggest change to my system. Made my speaker friggin sing.... Going to do the same to the interconnects next. Except I think they will need a 45 ton shackle.