Does distant/muffled coffee shop music fall under limited forms? I’m like you but I’ve found lately that this works for me. I’m beginning to suspect the fidelity of modern consumer speakers and headphones are just too good for focus because they seize my attention. It makes me wonder what would happen if I tried an EQ that cut bass/mids.

My problem is that “focus” music is often pretty repetitive. It can drive me nuts if I listen to it for 8 hours.