As much as i dislike Windows, i agree that the versions of the OS from that era were really fast (except for maybe Vista)!! As far as OS X, I had used OS X back around ~2007 - 2010, but can't recall what versions it was...and it performed fine back then too. I've been on one or another linux distro since around 2003 or maybe 2004, and have been running linux as my primary driver for laptops and desktops since maybe 2010 or so(right after i uncoincidentally abandoned OS X). While any issues that linux runs into tend to mostly related to proprietary drives, the majority of the time, things run fast...just like Windows did of that older, golden period of performance - and many times much better! I don't say this to sway anyone to move over/start using linux...and, in fact, linux is still far from perfect! Rather, its to show that there is joy in computing that still exists somewhere in the world. I have found it in linux, but i'm sure others have found it elsewhere as well.