It's not uncommon in the Audio production world to rack your machine in another room and use Fiber between the two to control it. If I upgrade the iMac Pro in my studio, i'd probably still grab the rack mount model as well and keep it in the studio. Assuming the noise profiles advertised are accurate.
It's mainly used for CI build servers. I know of a FANG company that just stacks iMac Pros on a shelf, they will definitely be happy about a powerful rackmount server.
Build servers, render servers, more rugged installation in a mobile video edit studio (e.g. in a rack that's mounted in a vehicle or on a mobile workstation that can be rolled out on a set).