I have just finished 1 year worth of Finasteride treatment, no benefit.

How long did it take for others to see return to baseline hair?

If you progressed over a year with your balding, then you can assume that the drug finasteride, didn’t reverse it. The real question is did it slow down the loss process. Without stopping it, you won’t know but if you stop it and the lose hair from stopping it, the hair you will lose in the first 3 months may not return if you go back on it. Damn difficult problem. If you are old enough, hair transplants are the solution. Combining it with minoxidil often makes for a better outcome.