I would guess a large number! With the increase in new car prices and the unwanted “enhancements” on newer models, many older folks opt for simpler times with mostly reliable cars that dont have heads up display or navigation or adaptive cruise control. I have a 26 year old Jaguar with 48K miles on it, and I finally had to sell my 2004 Acura with 286K miles because of an unacceptably high estimate to fix the multiple oil leaks from the engine. A mechanic bought the Acura, repaired it and is using it regularly! My newest car is a 2022 Jeep for long distance trips; it only has 31K miles on it!
My 2014 Jeep just turned 87k miles. Still running strong.