Small problems which are not so small when added by the dozens add up to wasted time, and in this case, quite a scare: for about a minute it looked like my files were toast, having been truncated to zero bytes.
I had to stop and check—doing ashowed zero bytes also. That’s scary stuff having your files be toast, at least for me.
About a minute later, the file sizes showed up. I call it unacceptable to not show the correct size immediately after copying the files—c'mon how hard is this to get right, Apple? And dozens of other problems that never get fixed.
Apple puts in all sorts of “improvements” based on their cool new technology (cool to Apple, and not necessarily for users). Then performance goes to crap with things like this, also file open and save dialogs and all sorts of things.