Just realized a great hidden benefit of the device could be preventing new sounds developing. My dad has been helping me cope with my tinnitus since he's had it for the last 2.5 years. His is quiet enough and/or he just got used to it enough he doesn't hear it unless someone reminds him.
However, a new noise just started to develop in his right ear today. His better ear, sadly. It's completely possible this is temporary and will go away or be intermittent, but it would match what some have said here that theirs started as one thing and then other tones/sounds come along later.
You'd obviously not know that Lenire, or the other forthcoming devices, prevented a new sound, thus the benefit being "hidden." I've read through most of the pages of this thread but can't recall if anyone proposed this theory.
I've had a hard time stopping myself from being worried about my own tinnitus "evolving" and now I'm possibly seeing it happen to my dad.