This can be useful for nas / home server owners.

• Headless
• Cached files can be obfuscated (if has privacy concerns)
• (Hopefully) Anonymous, available for all users in LAN,
• Or, have a web interface to log in with oauth, available for multiple users logged in
• Steam clients report games to be cached by the server, server fetches the required files via LAN transfer or from Steam CDN
• System administrators can setup quotas for total / per user, clean up cached files if exceeded
• (Hopefully) Cross-platform (Java, dotnet, etc.) or open-source