Yes but medical science still has questions why sensory hair cells die off early in the first place. At present there is no definite answer. The more companies involved in restoring hearing (or preventing it in the first place) the better. But don’t hold your breath on any type of break through in the near future. Everything moves at a snails pace and as I said before (capital funding is really lacking) in areas of research.
Slightly different but case in point - the CI has been around now for 40 - 45 years but has changed very little from when it was first introduced. You still have to drill a hole through someone’s skull, have external parts, have large battery, etc. You would think after 45 years medical science would of completely revamped the CI into a nice invisible tiny package. Not so and as many know the incoming sound produced by a CI is not normal nor does it perform well in noisy situations.
And if you talk to hearing experts at Stanford, Mass Ear Clinic, House Clinic, etc. they all are saying the answer to “hearing loss” is still way, way off since there are so many hurdles to climb. For now (five to ten years) it’s still going to be hearing aids and CI. Hopefully in ten to twenty years we find a cure or more likely some medical application that improves haring loss but does not fully restore damaged hair cells.
Time marches on but somethings (unfortunately) are not solved over night.