Had a client once in a high rise condo who NEEDED his TV in a weird spot and to get data and video to it, we had to hire someone to cut a 30’ long, 3" wide, and 1/2" deep channel across the concrete ceiling. Insane amount of work for such little benefit.

The building wouldn’t let them cut any deeper so we had to GLUE high strength cat6 down it and cover it with some special mud. Also, it was a 75" TV hung off a single-stud, single-arm articulating mount. He had to sign a waiver for that one