Still in service alongside the stealthy B-2 Spirit and the supersonic B-1 Lancer.
It's interesting to have that type of selection depending on the mission requirements but nothing that caters 2 of the factors simultaneously. Despite the wing angle not fitting the profile and articles online saying the B-21 Raider is subsonic, I'd suggest the classified nature of the project makes me believe that they want this or a bomber to possibly be both stealthy and supersonic. Why would the USA tell the whole world what their projects at Gloom Lake entail? Even the F-22's capabilities is speculation and best guesses from people not associated with the military.
The B-21 raider did its first test flight in November last year.
Here's a B-52 with its flaps extended: