Just because women are cutting their hair doesn't mean some women won't have long hair in a decade. It just won't be the same women who do now. That's normal. Most women with very long hair will cut it eventually. It's inevitable. They don't want to be old with thin/stringy long hair, or even if it stays nice, they just don't want the hassle.

Most women will never grow their hair super long unless fashion trends change. But some will for various reasons. I see no reason why that already small number will go down.

If younger women see older women with long hair being pressured to keep it long or being afraid to cut it, the younger women may never grow their hair long to begin with. If younger women see older women being supported in making changes or even profiting from their long hair (e.g., selling), a few might be encouraged to give super long hair a try. Hair sales and cutting videos are *good* for long-hair fans because they encourage the idea of growing super long hair. Some people enjoy watching the cut; some don't. To each their own, but even long-hair fans who don't watch the cut benefit from this cycle.

If producers stop selling haircut videos, then I might worry about reduced "supply" of long-haired women as there are no videos to make. If there's a sudden fashion craze where virtually all women in their teens or 20s chop their hair to chin length or shorter around the same time (think 1920s bobbing or during World War II when long hair was discouraged as wasteful), then I might worry about there being very few women very with long hair for many years.

Otherwise, the cycle continues. Carry on.