When you go out on a cold day, I would agree that more layers are not better. When you are loading Antivirus on your computer, that is NOT true. Antivirus programs will fight with each other leaving your system compromised and open to attack. It is better to get a great product than a bunch of products. If you like that layered look, let’s look at a program that combines different, complimentary technology. Sophos Intercept X on the endpoint, Cisco Umbrella DNS filtering and an good firewall with IPS like Sophos XG or Cisco Meraki make for great complimentary layers that will not compromise your system.