In my early drumming days I acquired a nice tambourine with a hyde head.
I 'fixed it' by cutting the head out and later ripped the jingles out to make other things.
(Please don't tell the Brazilians or the Southern Baptists).
I'll listen to ten Mr Tamborine Mans as my penance for this confession.
Mel Lewis had a famous A Zildjian ride with a cutout that darkened it.
I've seen other drummers such as Antonio Sanchez with rides with cutouts.
I have a 17" crash that was given to me that I repaired that has been one of my favorite cymbals for years. The cutout lowered the pitch, improved...
I heard an educator say that most growth/skill is acquired before someone's thirties or late thirties.
I am curious if anyone has info or personal experience of progress on the instrument as a musician ages.
Obviously life/family/interest/careers can distract.