I’m not the OP, but I had wondered the same thing. After already seeing up the other *arr’s I couldn’t work out the point of Prowlarr.
Re your comment about resource constrained, I have just started using Sonarr and Radarr on a Pi4. They seem to work OK. Had installed but not set up Prowlarr yet. Hopefully that wouldn’t slow things down if I used it to sync the other apps.
Summary:
HACS 2.0: A Major Update to the Home Assistant Community Store
• HACS 2.0, the latest version of the Home Assistant Community Store, brings significant improvements, including an easier installation method, faster updates, a revamped user interface, and improved notifications for Home Assistant updates and repairs.
• HACS serves as a platform for users to discover, install, and update community-created integrations and user interface elements, enhancing the functionality and customization of Home Assistant.
• The new version introduces a user interface that closely resembles the native look and functionality of Home Assistant, providing a consistent and intuitive experience.
• To enhance performance, HACS now utilizes a remote dataset stored in Cloudflare R2 buckets, reducing the number of API calls to GitHub and resulting in significantly faster updates.
• System and add-on updates are now displayed in the same format as native Home Assistant updates, eliminating the need to visit the HACS page for updates.
• HACS 2.0 introduces Template management, leveraging the new template type to improve Jinja templates.
• While HACS offers a wide range of community-made integrations, cards, themes, and more, it is important to note that these are not officially supported by Home Assistant and may affect system stability.
https://www.home-assistant.io/blog/2024/08/21/hacs-the-best-way-to-share-community-made-projects/