Hi @michael-day_7391 ,
These days, it's it's considered a "UX best practice" to provide minimal options in the installer because it's fewer choices to make when you're unfamiliar with the tool. Instead, programs should allow these to be configured post-installation. Most modern tools have shifted to this practice, including our products.
As for the folder, the ProgramData folder is indeed the standard/recommended practice on Windows. If you're still configuring Windows using multiple drives/partitions (less common these days w/SSD), you should definitely change the User/ProgramData directories during provisioning:
https://learn.microsoft.com/en-us/troubleshoot/windows-server/user-profiles-and-logon/relocation-of-users-and-programdata-directories
Many Windows programs (including ProGet) will use these to store application data, and it can balloon to gigabytes if you're not careful.
Thanks,
Alana