Yes, because Sonarr covers the full workflow of discovering episodes, invoking a downloader, organizing files, and updating Plex, provided the external download and Plex configuration are available.

• It can scan an existing library and download missing episodes, which fits collections with gaps.
• Fully configurable episode renaming can reduce Plex recognition problems caused by inconsistent filenames.
• The README explicitly lists Plex integration for notifications, library updates, and metadata.
• Sonarr is not a content source; acquisition still depends on Usenet, BitTorrent, and working downloaders or indexers.

Yes. Sonarr explicitly integrates with SABnzbd and NZBGet, while combining failed-download fallback with manual investigation.

• The README states that SABnzbd and NZBGet are fully integrated, connecting episode management with the downloader.
• Automatic failed-download handling tries another release after a download fails, reducing repeated manual work.
• Manual search lets you choose any release and inspect why a release was not downloaded automatically.
• Actual fallback success still depends on RSS feeds, indexers, and available alternative releases; the README does not promise that every failure will be recoverable.

Yes. Sonarr’s feature model explicitly includes specials, multi-episode releases, and episode-level renaming, making it more suitable than a downloader that only transfers files.

• The README states full support for specials and multi-episode releases, covering the two complex release types in question.
• It grabs, sorts, and renames episodes, turning download results into a more consistent library structure.
• Episode renaming is fully configurable, so the output can be adapted to Kodi or Plex recognition requirements.
• However, the README does not guarantee correct matching for every abnormal filename; special-episode metadata, show information, and external-source quality can affect import results.

It depends. Sonarr natively supports quality upgrades, but limited disk space and bandwidth make this feature configuration-sensitive, and the README gives no detailed resource-control guidance.

• The README explicitly gives upgrading from DVD quality to Blu-ray as an example, directly matching the requested workflow.
• It watches for better-quality versions of episodes that are already downloaded rather than only filling missing episodes.
• Plex and Kodi integrations can update the media library after organization, helping players discover replaced files.
• Project insights note that quality upgrades increase storage, network, and downloader load; without upgrade limits or retention policies, the budget may be exceeded. The README does not describe the exact settings for those controls.

Yes. Sonarr provides API documentation and already includes integrations with downloaders and media centers, although the README does not describe API coverage or authentication details.

• The project’s primary language is C#, which fits a C#-oriented service ecosystem, though an API client does not have to be written in C#.
• Getting Started links to API Documentation, indicating intended use by external tools and automation.
• The README lists full integrations with SABnzbd, NZBGet, Kodi, and Plex, reducing the number of adapters you must build yourself.
• Sonarr still owns TV semantics, episode state, and file organization; the surrounding system must handle errors, credentials, permissions, and API-version changes.

It depends. The README explicitly lists Raspberry Pi as a supported platform, but it does not establish stable behavior for every model, storage device, or download workload.

• The current-features list names Windows, Linux, macOS, Raspberry Pi, and other major platforms, so the target platform matches.
• Automatic episode detection, missing-episode scanning, renaming, and quality upgrades fit a continuously running media-management service.
• Sonarr still needs RSS sources, a downloader, and read/write access to media directories; the Pi’s CPU, memory, storage, and network may become practical constraints.
• The README provides no Raspberry Pi model matrix, minimum hardware requirements, installation details, or performance benchmarks, so platform listing alone cannot confirm the deployment.