For stuff other than extended tours, I carry a spare tire, (tubulars), pump, 5mm hex key, 2" spoke, and $40 cash.
I reduced it to that 40 years ago, before there were cell phones, which I still don't usually take with me. However, I'm thinking about getting a throwaway cell phone for emergencies.
Maybe I should start a thread, "Things I used to take, but no longer do."