On 2023-03-31 10:01, Alberto Salvia Novella wrote:
> Is this on purpose?

Yes, part of the idea was to let shell programmers easily test whether
cp successfully copied the data. Having cp -i conform to POSIX was a
lesser consideration, though it's a bit nicer if -n and -i are somewhat
consistent.

For what it's worth, the old behavior wasn't documented and the new
behavior is.