The performance hit seems to be a big issue for a lot of people.
In my case, I'm usually just changing opacity of foreground elements to export backgrounds. My edits should NOT be creating new revisions that can potentially interrupt or mess up the designers who are also actively working on other parts of the document. A quick toggle for a read-only mode shouldn't be rocket science to implement.
The performance hit seems to be a big issue for a lot of people.
In my case, I'm usually just changing opacity of foreground elements to export backgrounds. My edits should NOT be creating new revisions that can potentially interrupt or mess up the designers who are also actively working on other parts of the document. A quick toggle for a read-only mode shouldn't be rocket science to implement.