I might if I needed to worry about not having plenty of RAM ;)
With 1 GB installed and almost never using more than 768 MB at any given time, it's
an area that I haven't had to micro-manage. 512 MB of RAM (PC 3200) was $31.00 last
week at Circuit City, and is still that price this week for PC 2700 (after rebates).
"Back in the day" I would certainly need tweaking. I once spent $185 for 4 MB of
RAM, and had to "trade in" my 2 MB chip to boot!