Not really. I used a few of those programs when I was at OS 9, myself. (my computer is also 6 years old. Made in Summer of 2000, if I recall correctly.)
When I first got my computer (it was a hand-me-down from my brother), it was equipped with Mac OS 9.0.4. It only had about 128 MB of RAM, clearly not enough for an upgrade to Mac OS X. I had used it on my father's computer beforehand and immediately got hooked to it.
Being stuck at OS 9, I had to wait until some money came along to purchase another RAM chip. Until then, I slowly upgraded it to 9.1, 9.2., 9.2.1, and 9.2.2 (the final version of OS 9). Then, after my birthday, I got a 256 MB RAM chip, totaling my RAM at 384 MB (though I realize, it's still not enough, as my applications quit themselves from time to time). Then, I got my father's disc for Mac OS X Jaguar (10.2), and upgraded to the greatness of Mac OS X. :D
After a year or so of 10.2.8, I upgraded to Panther (I illegally obtained that one thanks to BitTorrent, I felt bad about it immediately after installation). Stayed on 10.3.9 for a month, and then upgraded to Tiger (legitimately).
Unfortunately, I think Tiger'll be the end of the road for this computer. It's down to 5 GB in space, and can only barely run cool videos and stuff without lagging/crashing/burning.
Hopefully, I can get a new computer for myself for college. I'm hoping it can be a MacBook Pro.