A non-mobile work environment, but unplug one cord and you can take the laptop part to meetings, including offsite, you can travel with it, work from the coffee shop or roof or park, keep working if there's work being done on your office (painting or whatever) so you can't be in there at the moment, if you usually work in a corporate office but WFH some days you still have the same machine, can take it to co-workers' desks to show them stuff without having to screen-share and having both workstations together at once, which can be nice in some situations. Built in UPS is sometimes handy, too—no power-offs because you kicked a cord.

I'm not arguing against desktops for people who like them but this "I don't understand laptops" stuff (several posts, not just this one) is bizarre.