Yep. Frequency Therapeutics could make a tremendous medical breakthrough here. But some caution is warranted, even in light of their promising human trials: cochlear cell regeneration and subsequent hearing restoration is observed in reptiles and birds, so there is reason to believe that they can coax mammalian ears to do the same thing, but it may not be as generalizable a result across the human body. But damn will people start trying mightily if it succeeds in the ears. That said, even simply finding a cure for sensorineural hearing loss is nothing short of perhaps one of the top 10 medical breakthroughs in the last 50 years if you look at the cost to society and prevalence of it.