It's so mondbogglibg what we still use it. With every phone becoming a camera phone, it's unusual NOT to have hungreds or even thousands of 2-3MB photos on your phone. But try to copy your Camera folder on a PC, - and Win Explorer acts like it has a heart attack! And it hasn't improved in entire freaking decade!
even remember a time when my galaxy s4 mini would ask me how it should represent itself when connected via usb; also drivedroid to emulate a cdrom drive with an downloaded .iso in order to boot older computers that don't know how to usb.
maybe i have been spoiled by the real computer in my pocket experience of custom rom's.
I wish Android devices instead worked like iPods, which had a partition that mounted as a plain old USB/Firewire disk when plugged into a computer.
[0]: https://en.wikipedia.org/wiki/Media_Transfer_Protocol