I never had any interest in Macs until well after it was announced that they would be moving to Intel chips - by this time (mid-2007) I was starting to get annoyed that my PC was acting up, and then after switching to Vista, I started thinking of my alternatives...
I could always go back to Linux (I've used it on and off since '93), or I could at least check out what OS X was all about. Well once I found out that it was *based* on UNIX and had that as its core, I started getting *really* interested.
This is when the Intel switch started to have meaning for me - if I got a Mac and decided that it wasn't really what I was looking for, I could always go back and run Windows (or even Linux) on it, so I did more and more research, and got more and more fed up with Vista's incompatibilities and its "all or nothing" anal-retentive security system, and finally in early 2008, I bought my first Mac that you see in my .sig
So yes, without the Intel switch, I honestly never would've considered Macs at the time, and now I am *so* happy that I switched - it's changed everything about the way I use the computer and has made me much more productive in the process

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