The firewall on that computer killed the battery (with repeated crashing). It also refused to work with a USB Ethernet adapter so I could only use wifi. It was clearly a product meant to check a security box, written by a company that knew nothing about Macs, bought by Enterprise Windows admins. It was incredibly frustrating. (The next version of MacOS moved firewalls away from in-kernel to extensions. I like to think it was my repeated crash logs that made the difference.)

I half wonder if that’s part of the issue with Windows PCs and their battery life. The OS requires so much extra monitoring just to protect itself that it ends up affecting performance and battery life significantly. It wouldn’t be surprising to me if this alone was the major performance boost Macs have over Windows laptops.