This is what I do. The streaming subscription isn’t that much, and I can download a single album or a txt file with multiple album links with just one command. Only downside of the streaming subscription is you will occasionally run into albums that are or have purchase-only tracks that you can’t download without buying the album, but I don’t seem to run into those too often.

Managed to get my entire library in FLAC except for one album - “I Love You Because,” the soundtrack to what is apparently an obscure musical based on Jane Austen’s “Pride and Prejudice”.