Mine's not nearly that bad but it's still more than I'd like, too much more than I'd like. My "guest room" is more storage than guest room and I haven't touched most of that in years. My garage is 2/3s full of junk that needs to go. Thought about building a shed but then why spend the money to store stuff I may never use.I'm older than you are and I guess I haven't reached that age.
But then we don't have a lot of clutter in our home, at least what I would call clutter. (Well, except for my desk that sometimes looks like a recycling bin exploded on it.) I try to keep it comfortable and livable if not a fashion statement.
I have a friend who is a hopeless hoarder with good stuff and crap in and out of boxes piled almost all the way to the ceiling in every room in the house with just a narrow path to her chair in front of the TV where she orders and orders and orders stuff until she is broke and borrowing from her friends for food. It's sad and dangerous but such people rarely know they have a problem much less are willing to ask for or accept help.
And I see that and I think I'm not so bad.