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?
That’s not really different than Windows. If you do a clean reinstall, all your application data is gone unless you have a backup.
This is why I have my home folder on a separate drive; all of my application data is there and not on my system drive, so a reinstall basically just requires generating a text file of my installed packages, reformatting the system drive and installing the OS, and then installing the packages from the text file.