I'll add another rationale just for completeness:
When having multiple top level patches, abstractions and sub-patches
open, displaying the original filename in the dialog gives the user
another confirmation which of the open windows the "save as" command is
referring to.
On 18.09.19 19:54,
I have to agree - I'm used to having the "save as" start up with the existing
filename, with the text selected so that you can just type in a new one from
scratch, or hit the right-arrow to just edit the last letter or digit of the
name.
Git's cool, but when I'm working with others the name+number
> Cause to me it doesn’t make sense at all.
I hope we all agree on that :-) "save as" should start at the current file
name, that's the convention and IMO there's absolutely no reason for doing it
differently. As people have already noted, the "save as" dialog will already
warn you when you try