> even if it's not technically Unruh radiation, maybe there's a reference frame or other perspective where the math works anyway There can't be, by Lorentz inv

> even if it's not technically Unruh radiation, maybe there's a reference frame or other perspective where the math works anyway There can't be, by Lorentz invariance. If a free-falling observer sees zero radiation in one frame, they must see zero radiation in any frame.