Is there a way to update all assets that use the same email in their Flow to use a new email all at once? We will regularly update content that is downloaded through emails, so when we create a new email we have to manually go through all assets in the email's "Used By" tab and update the Flow to include the new email, but is there a way to update all of those together instead of one by one?
Is there any specific reason why you have to create the new emails every time? Can't you update the new content in the existing email itself?
There must be ways with the modular design to customize the email templates to meet your requirement. It will help to suggest something if you can share the challenge in updating the existing email?
For the record keeping, you can clone the existing email and in description put a comment on the date when you de commissioned that email version and modify that thereafter. I guess this will save a lot of your time in replacing the emails everywhere.
^this. Assuming the content is still similar, you'd also retain life-of-email performance metrics instead of starting from scratch each time.