Having recently installed and played around with 10.4 on my Cube, and with 10.14 coming out next week, it dawned on me how few of OS X's new features I use 10 releases later. I've been a Mac user since OS 9 so have had every version of OS X, and I find myself less and less excited about new releases. I would have been scouring the internet for the GM by now 5 years ago, but I'm not that bothered about Mojave from what I've seen. Anyway back to Tiger, the one thing I can think of that I use a lot now is Quicklook (pressing space on a file to preview it.) That was/is a really useful feature, and Tiger feels clunky without it. In fact I now find myself using Quicklook for reading, listening and watching most things rather than opening up the files. But other than that, it's a really nice OS. I can live without the last 10 years of UI changes, in fact I really like the design of Tiger. There's no real point to this thread, other than saying I think Apple did a pretty good job making an OS that still feels usable a decade later, and I'd be interested to know if anybody else has found any 'killer features' in more recent versions that I may be missing out on?