Seems the thing most people are into, these says, is “bumper stickers” on their laptop lids. I suspect neutral colors work best for that.
I’ve found that I tend to replace my primary development machine every 3 years or so. Since retiring, I don’t travel much, so I got an M4Pro Mini. Works great, and I still have my M1Max MacBook Pro (my previous development machine), for when I want to hit the road.
They are really signals to others.