Reimaging a computer from a full system image, even if that image so happens to have been taken immediately after a completely clean install of the OS, is not the same thing as doing a completely clean install of the OS.
You can reimage (and often do) from images that have been taken nearest to the present day in the case of something like a catastrophic disc drive failure. What you get back is the system as it was at the moment the full system image was taken.
You are correct that I am saying, that absent a full system image from which one could restore, one does the completely clean install of the OS (I have no idea what you mean by "after the SSD is transferred out"), then do a fresh install of your apps and installed programs.
By user data I mean just that - it covers whatever it needs to cover - but generally includes photos, music, any office suite documents of any type, installers for programs (if you include those in your user data backup and have put the collection together before taking it), videos, etc., etc., etc. When it comes to preferences/settings when a given program supports cloud storage of same (e.g., Firefox and Chrome both keep track of your installed add-ons/extensions (respectively) plus a lot of other stuff if you set up a sync account and stay logged in to it when using the browser; some other apps and cloud-connected applications do some thing similar) I rely on that to bring back my personalized settings. When a program doesn't do this then I take note, if that's necessary, of what settings I've tweaked and just count on having to do that tweaking again myself.
Brian AKA Bri the Tech Guy (website in my user profile) - Windows 10 Home, 64-Bit, Version 1803, Build 17134
Memory is a crazy woman that hoards rags and throws away food.
~ Austin O'Malley