Whereas I'm likely in the niche below you, buying the two year old model, keeping it two years, deciding it has very little value left, and then keeping it as long as it suits my needs. I kept my T60 until the non-Win7 compatible display driver drove me nuts by causing blue screens coming out of sleep. Put XP back on it and promptly sold it for $100. So far the T510 I replaced it with does everything I want.No more than two years, with the exception being low price laptops like Chromebooks. Keeping it any longer is just wasting away what value it has left. Two years is a long time in the mobile computing world, I sell my devices while they still have value and use that money towards getting the newer models.
Have a Dell Inspiron 6000 (Dothan) from 2004ish maybe, that was replaced with a Studio 1735 (Penryn) in 2007. The Studio 17 is going strong except for the left hinge locking up and breaking the bezel about two years ago.
I bought a Toshiba Satellite C55 last year in November, but I wanted something with a dGPU for gaming so I bought my current laptop in March, a Lenovo Ideapad u530 touch. Didn't do much research on this and ended up with a gimped nV GT730m so I'm selling it and buying a Lenovo Y50.
Did kinda the same thing with my current laptop, but aside from the weak GPU, it's been good to me. The Core i5 still holds strong, and outpaces the Phenom triple core (the other choice I had at the time, but with stronger GPU) in every metric. I don't regret my choice.
Don't get me wrong, it's a great laptop, and it has an i7 dualcore with 8gb ram, so it's plenty fast, but it just can't play the games I want at 1080p with the detail settings I want to use.
Its right under "check this box if you have something useless to post."
I'd wager Win 7 or a full Linux OS (Linux Mint) would work reasonably well on that Inspiron with little to no cash input. No need to let your upgrades on it go to waste.My daughter's 2007 Dell Inspiron is a little different. It has a SATA HDD, which I updated with an SSD. I also pumped up the RAM and put a faster AMD processor in... but it's still stuck with XP and I'm loathe to waste my time and money trying to get W7 to work on it. I put Puppy Linux on it for a bit... but it doesn't really play well, for some reason. She will be headed to college in a few years, I'll probably buy her a new laptop at that time...
I bought my wife an iPad for Mother's Day this year... after using that I don't see a need for a laptop anymore in any event.
I'd wager Win 7 or a full Linux OS (Linux Mint) would work reasonably well on that Inspiron with little to no cash input. No need to let your upgrades on it go to waste.
Also, I'd take my laptop over any tablet any day of the year. Just sayin.
Still running a Dell Inspiron E1505 with Win 7/4GB Ram/90GB SSD. Purchased new from Dell in 2006 and have had only one issue (video card replaced under warranty). I am getting ready to upgrade the wireless card, CPU (from Core Duo to Core2Duo) and add a bluetooth card. Parts are cheap so why not, plus the Core2Duo will allow me to install the 64-bit version of Win 7 (CPU was from another laptop upgrade for friend, so free).
I'd have to say it's hard to place a value with regards to the years you keep a laptop. For someone like me, as long as it continues to do the things I need (surfing web, email and VPN/remote desktop into work) then I see no reason to not keep on going until it becomes unservicable or not used.
I bought my wife an iPad for Mother's Day this year... after using that I don't see a need for a laptop anymore in any event.