I got a Pocket consumer key with retrieval access and made a Python script that can retrieve the full contents of your saves.

It's not perfect. I had 5010 saves in Pocket. The script caught all of them but there were errors during the extraction process. I ended up with 3958 extracted articles and 1052 failures.

Details are in the README on the repo.

MIT license so do with it as you will. I suspect someone else can improve upon it in form and function.