Yes, indeed! My wife is still using my 10-year-old Mac "Wall Street" G3 laptop -- which has never had a problem.
I'm writing this on my 2003 Titanium G4 Powerbook -- which I bought used -- sight unseen -- from a fellow FReeper several years ago. ;-) I have used it so constantly and heavily for doing high-end graphics ("overhead imagery", cartography and graphics-heavy presentations for archaeology) that the plastic frame to the right of the trackpad is worn down ~3mm below the titanium deck plate. Aside from adding a larger HD and 1 MB of RAM, all I have done is lug it all over the country -- including "in the field" on digs -- and use the heck out of it.
I have the $$ set aside for a new 17" Macbook Pro, but am holding off in hopes Apple will soon offer their great LED backlighting on the 17" (as they now do their 15").
When I get the new 17" MBP, I will set up a partition to run XP via VMWare. Then I'll dump my Dell laptop -- that I only use for running ESRI's ArcGIS software...
I run both systems daily -- and hate every moment I'm on the Dell. OSX/Mac is the only way to go!
I bought that same G4 Titanium notebook (used) myself in the past week.
I had the G4 desktop previously and it did everything I wanted to do reliably. With the PCs, it seems like something new always comes up to change one’s computing environment — and the hardware breaks down. As a writer, my keyboard would break down, the computer would get infected, etc., etc., etc.
Just being impervious to the viruses alone is the greatest recommendation for the Apple. I don’t want to have to deal with those hassles anymore. I want a simple machine that does everything the same way reliably. That’s all I ask.
Let those other guys send a man to the moon.