I don't understand the love for OSX/macOS
at all anymore. I feel like the last time a release really felt like an improvement was 10.5, with 10.6 being mostly the same, and downhill each release afterward. Earlier this year, after not having used OSX since 10.7 (which I wound up downgrading back to 10.6 after a short time), I bought a Mac Mini running "El Capitan" (whatever version number that is, I don't care anymore).
Compared to my old late-2008 13" Macbook with a Core 2 Duo and 2GB of RAM, this Mini with an i7 and 16 GB of RAM takes longer to boot, feels more sluggish during regular usage, and is noticeably less stable. Launchpad is new and dumb and drives me nuts, but other than that, I don't really see what, if anything, has been added to "justify" such a downgrade in usability. There was a time when OSX was a dream, but today it's akin to Solaris (i.e., Slowlaris) in how it feels slow, buggy, and even outdated to me now.
Nowadays, my primary machine is a Lenovo Ideapad Y410P with an i7 (Haswell) and 8GB of RAM running Slackware. Even with GRUB2 set to wait for 3 seconds and using sysvinit (with the huge kernel, no less, rather than the generic kernel), it takes less time to boot into a functioning desktop. It's far more stable, and feels far snappier. Virtualization works much better. I don't miss OSX at all, and, now that I've gotten the hang of tiling window management, I don't think I'd go back even if Apple managed to restore that Leopard-era quality (awesomewm is practically a killer app for me now, as it's boosted my productivity in a way that nothing else has since I picked up Vim 10 years ago). It's also nice having choice and Freedom again, especially compared to Apple's "walled garden" which has been leaking out of the iPhone and into their PCs in the name of "security"...
tl;dr: Linux rulez, macOS droolz :p