Radio moved off the floor (I think) in the fall of '97 or '98. Pretty sure it was the Wilderness Season.
Think I was sitting as a print reporter with McKinney & the late Ritter Collett when the students went up and over us in '97, ostensibly because Geno was faster than Chad Allen for like 20 seconds.
There are a few places that have TV/radio well off the floor. Duke is bizarre, and comparable to nothing. That 'booth' is essentially directly above the sideline at halfcourt. You look down at essentially an 70/110-degree angle. You are essentially on court, but in a balloon basket 35 feet up or something. It is actually a lot like the camera decks on the east side of Millett Hall, but much closer to the playing surface. Like doing a game from a fire escape stairwell with mesh floor.
When we played at UNC in '02, visiting & home radio were still in the equivalent of suites on the concourse level; TV was at courtside. Am told that radio there is now down low as well.
We were off the floor at Iowa, up about 15 rows, almost in a corner. Ditto for the tourneys at Arizona State. The new setup at the MAC Tournament is terrible for radio.
For announcers, you lose a lot of the color of the game by not being at court level. Calling the game without being able to read faces, hear coaches and talk to officials is harder. It's a lot like the 'fake' broadcasts that are done to translate soccer or F1 for English language; imagine just sitting in a room in Bristol, watching a game on TV and trying to broadcast it intelligently.