I used to have a greater need for a file manager in other jobs. I don’t have the same need anymore but Forklift (https://binarynights.com/) has always been great and I still use it from time to time.
I’m not even that old, but I’d really love to argue to simplify the entire auto infotainment stack. I don’t even need a screen. I just bring my own by magnetically attaching my phone that I’ll use to navigate and Bluetooth music or podcasts. If CarPlay becomes the standard that allows me to not pay for whatever crappy tablet UI automakers are pushing, fine. But that doesn’t make CarPlay a necessity, it just makes it the least bad option.