Loss of the top notes in falsetto for singers, say, over 40
My falsetto (hooty disconnected breathy falsetto....like the Stones Emotional Rescue) used to go up to an E5 or F5 when warmed up without straining. Above the age of 40, my top has been limited to around a D5 in falsetto on a really good day (although lately I haven't bothered trying above a C or C#). It also usually requires warming up to sing in hooty/breathy falsetto, but when I was younger it used to not require warming up just to start singing in falsetto. (although maybe getting to the highest notes required warming up)
Just wondering if it is normal to lose the top notes in falsetto when older. I know there are other singers where this hasn't occurred, but is this common?