It may be because the longer you have this the more meds and psychotherapy you've tried. I (age 43) was no better than I was in my 20s until we made the carefully considered decision to go on first Emsam which is an MAOI and then several years later clozapine and while I'm not stable (and currently having my worst time in 10 months) I am much closer than ever before. I've been out of the hospital for over 3 years.
The last time I was in was to get started on clozapine. But it took many years and may meds to get here and it is totally med dependent; take away the clozapine or Emsam and I'll be out of control again regardless of being older.