The older phone will live in my office - although will take it on camping trips so we have hotspot. The new one goes with me when I run around. Mostly so I can call wife, or in an emergency. I will only return office phone calls if I recognize the caller, or it leaves a message I want.
Retired now, so no loss of new business - regular continuing clients know how to reach me ... they leave a message if I don't pick up. I'd estimate half my calls now are Robots, which I block - helps slightly.
Family ONLY will have new number.