It was dropped on concrete once by its corner (have some bite marks left on the case from that incident), spilled stuff over it, also I've used it in dusty environments, and I'm the person who never cleans their stuff. The display is dusty and the keyboard is filthy. But it just works, and I said to myself that I won't get another one until it fails. I think I might have to destroy it myself, otherwise will be stuck with it forever!
Notes: * The carbon-fiber-like fabric that covers the palm area is just dissolving itself. It also collects grease, so it is really not a nice thing to touch after all these years. Good thing is that it can be scrapped off, and the remaining surface is clean.
* It does not have a full keyboard. I use a Thinkpad for work and that one has separate PgUp/PgDn/Home/End/Insert/Del keys, which you won't find on the XPS. Personally for me that would exclude the XPS as a work laptop, because I wouldn't be able to use it without an external keyboard. The touchpad is excellent on the XPS though.
* watch out for the wifi module, and whether it is soldered on the motherboard or can be changed. Dell have a tendency to use non-linux friendly Broadcom / Killer chips, in fact, when it came out I had to get an Intel module to get stuff working. May not be an issue anymore?
Are you sure you want such a small laptop for work? I'd go for a larger screen tbh (but if you have an external monitor then it's not a problem).