It's wondrous to me how viable an old laptop can be. My daily driver is a "Ship of Theseus" Dell D630 from 2008 and it's perfectly usable for the sysadmin work I do. The lack of USB 3.0 is maddening, but that aside it's fine for my day-to-day document prep and admin, scripting, mail, and web browsing. Installing an SSD added years to the machine's life. I'm on my third keyboard and second lid (hinge failure) but both of those are, arguably, wear items. >smile<

(I've had a brand new Latitude sitting unused for over a year now. I just can't get excited about getting used to a new keyboard or rebuilding my entire software environment on a new machine.)