I keep wondering why lights aren't getting built into new-build homes. They're no longer bulbs, but LEDs, they're programmably colored (you can do orange/purple

I keep wondering why lights aren't getting built into new-build homes. They're no longer bulbs, but LEDs, they're programmably colored (you can do orange/purple for Halloween, etc), and they'd be practically invisible when off. Have them around eaves/gutters, windows, whatever. Is there some aspect of this I'm not getting that makes it impractical (or ugly in the off seasons)?