Sorry, I can’t remember.
It looks to Sam and me like it’ll work.
I just solved a simulator problem by creating a post and into it inserting a link to all of the images and then rebaking all of the posts that contain transparent.gif.
This looks like a somewhat more elegant solution.
I would say make a database-only backup and give it a try. I’m sort of on vacation, but if you have a budget I can see what I can do.
And I too have an important client on ams3; I’ve not yet moved them to aws, but I think that’s happening soon. I have a friend who worked for digital ocean who recommended ams3 because it was their best data center and was largely underutilized (this was now long ago). That didn’t work out as I’d hoped.