However, my perspective comes from someone who drives SSD-equipped, multi-core, tier-1 GPU-equipped computers all day. If it doesn't snap to in a second, I'm upset. For someone who's actually used to waiting, and waiting, and waiting for the machine to respond to a command on these two old dogs, a Windows 10 upgrade would feel the same--and also give you a new, more secure OS.
The 2008-era X61, though, is another story: It's actually very usable and again, if I was on a tight budget and needed a portable, Windows 10 on this laptop would be OK. Not great, but it would work.
This may be why analysts are predicting that Windows 10 won't goose PC sales: You can get by with a 7-year-old laptop and the new OS if you really have to. You give up a lot, though, from battery life to performance and overall weight, though.
Would you run Windows 10 on your old beater PC? Let us know in the comments.
Sign up for CIO Asia eNewsletters.