Safari vs. Chrome (or Firefox) is one part of why I can get so much more mileage out of a Mac's memory than I can under Linux or Windows. It's wildly more respectful of system resources, across the board—memory, processor cycles, and battery.

The rest of their software's mostly like that, too, with the possible exception of Xcode. I often forget Preview with a half-dozen PDFs is open, and Pages with a document, and Numbers. I wouldn't forget a single tab of Google Docs under Chrome, left open for weeks, because it would make itself known in system responsiveness and battery use. Ditto MS Office. Mac Terminal's got notably lower input latency than most other terminal emulators, especially featureful ones.

Apple, seemingly almost uniquely among major software vendors, gives a shit about performance, and it shows. I really, really wish they had competitors, but in so many ways they're the only ones doing what they do, to the point that they can make periodic serious blunders and I'm left going, "yeah, but what else am I gonna buy, that won't have a 'normal' that's overall-worse than Apple's 'broken'?"