Please add an option to set a default file type for "Save as Copy"

Yeah it's really frustrating having to select the file type every single image, especially if you're saving a lot of images back to back. 

The weird thing is, Photoshop has ocassionally defaulted to certain non-PSD formats in Save as Copy, but it seems rare and I don't know what triggered it.

Yes, I need this feature!

I always use 'save a copy' and choose the WebP file for images on blogs so they are smaller in size. I probably do dozens of such images daily so making this process way smoother/faster could save up so much time for me.

Actually, that's a sensible request that should have a setting in Preferences. But no, I don't think it's possible now.