There is also the (evidently dying) principle of by default wanting control over my computer and filesystem. I know this is not compelling to most people anymore but I feel like if I want 25 files in a directory, I expect to see 25 there. Not 26 because the operating system really really really really wants to pollute it with one more file. I want 25 there. If I wanted that other file there, I would have explicitly commanded my computer to put it there.
I also object to my operating system running all these background processes on MY computer without me commanding it to, and it suggesting on its own that I do this or run that, again in absence of any command to do so. More and more, operating systems and applications are treating MY computer as a dumping ground and science experiment: for things it wants to do, instead of what I want it to do.
I should not have to go off and find a setting somewhere just to stop my operating system from doing things on its own I don’t ask for.
It's an impedance mismatch. You're moving files between a system that supports multiple streams per file (data fork + resource fork) to a system that has no concept of different streams (POSIX). The extra stream has to go somewhere, or you get data loss.
It's worth noting that almost all modern file systems support multiple streams. NTFS has alternate data streams, Ext4 has xattrs. Modern SMB and NFSv4 also both support this at the protocol level.
The problem arises when you're using Samba (without vfs_streams enabled), or you're writing to a legacy FAT filesystem, in which case you start getting the AppleDouble files - again, to prevent data loss.
For plenty of users "control over my filesystem" means being able to put an icon in a certain position and have it stay there when they come back to the folder.
I also object to my operating system running all these background processes on MY computer without me commanding it to, and it suggesting on its own that I do this or run that, again in absence of any command to do so. More and more, operating systems and applications are treating MY computer as a dumping ground and science experiment: for things it wants to do, instead of what I want it to do.
I should not have to go off and find a setting somewhere just to stop my operating system from doing things on its own I don’t ask for.