Please add a feature in all page/email building pages that lets an admin save a block as a "Master Block", that can then be added to any other page/email. But then make it so when you edit the master block in one page, it automatically edits the block in _all_ other pages. Include the ability to take a master block and "downgrade it" to just a normal block so that editing it locally won't affect all the other instances of the block. Potentially also add a place in the UI where you can see all master blocks, and what page(s) they exist in. ("Master block" may not be the right term, feel free to name it whatever you like)