One thing I really like is that it's so much more similar to Linux than Windows. Many of my favourite Linux server tools also run on Mac. They're either included or are a "brew install x" away.
Everything from cron to nginx (for local web dev) works like a charm. Combine this with the extreme ease of doing office-type work on a Macbook: Excel works, printing / scanning works. Add in multi-day battery life and a kickass CPU. Price this the same or lower than the equivalent Windows machine. It's a learning curve to go from Windows to MacOS, but well worth it, and a total no-brainer for most non-gamers.