The best sound investment is in your room acoustics and making your room audio-only with a proper speaker setup.
Truth^^^ It’s hard to take any cable argument seriously (or DAC, amp, etc) if this is attended to.
The key question is: Do my room’s issues make it impossible to hear cable differences?
If your room isn’t really dialed in, then the answer is probably "yes."
But there’s no law against enjoyment from placebos, of course -- or spending money on placebos, or recommending placebos as if they were real...oh wait. That would border on deception.

