I'm posting this short note from the kids' s 1999' iMac DV SE. A 400MHz PowerPC G3 chip, 512MB RAM and 20GB internal hard disk, this Mac has been my own machine from November 1999 until the early days of 2003. It's been running MacOS 8, MacOS 9, and MacOS X, from the Beta up to the current MacOS X 10.4.11.
For the basic tasks such as word processing and web surfing this 9-years old computer do the job just fine. Amazingly smooth interactions. No interface glitches. No significant degradation of the overall performances degradation compared to the actual settings - OS + apps - of its birth almost a decade ago. Which reminds me of the good old Agilent Mini-OTDR E6000 : a 8-yrs old test instrument that beats state-of-the-art way more recent machines on every single key feature, but that's another story ;-)
Back to the Mac. Whilst I'm typing this post, I'm listening to music. The local iTunes playing my own library, located on my MacBook (one floor above), through the home network. The iMac is connected on the net thanks to PLC power line communication, 85Mbps plugs.
In the meantime, my good old PowerBook G4 (which survived a 850°F fire in March 2005) is synching wirelessly on TimeMachine; its backup drive ? a 500GB external hard disk hooked up the MacBook.
Last, I control the iMac' s iTunes with my iPhone, thanks to Remote.
No hassles, no hurdles. Everything Apple is intuitive, smooth, and dead simple ***. That's why I love Apple.
post-scriptum : besides the internal disk and the memory which I upgraded back in 2002, the only thing I've changed on the iMac is the keyboard and the mouse. Simply because the new Apple keyboard is more convenient than the old one (tiny keys, sometimes clunky touch), and the Mighty Mouse is an amazing piece of Industrial Design per the (Apple) book.
*** of course, you can do all that stuff with Wintel PCs. But can you do it so easily ? Just try this one : remote control your non-iTunes music library with your non-iPhone smartphone. Count how many clicks you need to set up the whole thing, and call me back.