I retired my 4gb/120gb/celeron ThinkPad 11e today, since I've got a more powerful laptop lying around and I've used it for 8 years nonstop. It used to freeze up occasionally when there were more than 4 Firefox tabs open, and not to mention, my obsession with GNOME causing a shortage of system resources.
Man that ThinkPad felt like family, I'm gonna miss using it.
You could always put it into service as a network wide ad blocker with PiHole. Might also speed up web browsing a bit too, since PiHole also works as a DNS cache.