Well for example, I used topical minoxidil for two years, also was using finasteride for one of those years.. I ended up have a massive burst of scalp inflammation and I quit minoxidil thinking that caused it. It took a year and a few months and I shed all the hair I was regrowing and my cycles were so messed up I was shedding short hairs when my hair was long. If you quit minoxidil, you lose the gains plain and simple
Finasteride isn't strong enough to prevent follicles from miniaturising. It's an entirely different situation if your body is now emulating the hormones of a woman (higher amounts of E and castration levels of T), where androgens can't have an effect on you.