Only one of them has broken so far, and it was only an issue with the display. I repurposed it into a homelab/Podman host and it's been able to work just fine!
As a quick aside, if you're ever one of the 15 people who will likely do this, buy a Thinkpad dock. They're cheap, and it basically triples your I/O!
Just to continue the question, what do you do with the other laptops? You should have at least 4 or 5 more which are unaccounted for. I imagine only one is used currently.
Not them, but I keep a long trail of old laptops and generally do in fact keep them all in active use on a regular basis. For me part of the appeal was that I like distro-hopping, so multiple machines made it easy to keep rotating OSs without much trouble. The core bits (browser profile, password manager) are synced, and my projects live in version control that's easy to pull to any machine that happens to not have it yet, so I just... grab the closest machine when I want to do something and go. (And I tend to have them laying around multiple rooms so there's always one at hand)
I gave an old workstation to my mom and a spare T440p to my brother, now the x201 and T460s occupy my tinker station and bedroom respectively. Oh, and there's also a T420 that my other brother uses as a media server, but that's not really mine anymore :p