Save and export
File > Save and Export
So many times the last time I saved a file was to export and then I had to reboot. This is an option that would save the headache of rebuilding just because someone asked you for a proof and your brain closed a file that was "saved".
Matthew, why don’t you use Save a Copy instead of Save As?
Save As saves the current file as a new one and keeps it opened.
Save a Copy... well, it saves a copy, and leaves your original file opened.
The issue is knows though, and I believe some steps are made toward making it more streamlined.