There is never going to be a cure until a highly breakthrough technology that will likely be appplicable to numerous other fields of medicine, this is either going to be genetic silencing via miRNA/siRNA or cloning.
No topical is ever going to be a cure because they cannot be localized to the scalp, unless some kind of miracle vehicle is developed which is very unlikely. If topicals could be localized you could already apply your choice of AA like bicalutamide or AR degraders in extreme doses + estrogen and be essentially cured, no need for any new drugs. But because they will always go systemic this route is just a cope.
Disabling the androgen receptor with >99% targettable genetic vectors is the only sensible solution that won't have you putting your balls on the chopping block for a few terminal hairs. Probably not technologically feasible within this decade though.