I don't actually use the bibliography (instead I assemble them in a Zotero library and then paste them into the document, since I need to make several parts (sources and literature and music scores).
However, I will unlink the citations, it feels better when I pass this onto the printers.
And yes, I will certainly keep the linked copy, should I ever need to go back to it.
Yes, that's indeed preferable. The Chicago manual actually explicitly warns that such fields can lead to problems with automated processes used in typesetting and printing
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When you do unlink, it’s best to keep a copy with links, so that you can go back to it if needed.
However, I will unlink the citations, it feels better when I pass this onto the printers.
And yes, I will certainly keep the linked copy, should I ever need to go back to it.