I had win95 on a Pentium 90 MHz that ran without any trouble or blue screen of death for 3 years. It still runs and being used as the gateway to the internet and some low level games without locking up. I built that from scratch. Then I bought a 550MHz on Win98 that ran without any trouble also for 3 years. Lately, it is having some problems. What I noticed is that there are two many programs registered into the registry. I am in the process of cleaning them out.
Last time Norton ran for Antivirus, it reported 115,000 files in 4150 folders. I wonder if a Mac has the same amout of activity, it will choke too.
My laptop on W2K and another laptop on W98SE, that I use on trips has never locked up. I do run SQL2000 and DB2 on them. So, may be it is the rouge programs people write that cause problems. Any heavy Mac user can comment on this. The grass may look greener at the neighbor's yard....
But, to the topic of the new MAC being cool...it is way too cool...