20+ years ago, Lindows had a great app store that let you create an “aisle” of your favorite apps so if/when you’d reinstall your OS, instead of searching and installing all your apps one-by-one, you’d just go to your aisle, click “install all” and boom.
Is there anything that exists like that today?
In APK based systems (Alpine, Chimera, Adelie) there is /etc/apk/world
It is a list of all the packages you have explicitly installed. When you add and remove from this list (all apk does), the system solves for dependencies and makes sure you have the right packages installed.
You could bring up a new system by updating this file.