I should know better than to leave tabs open in Safari. Was clearing down this morning and Safari crashed. Tab groups remained intact, but tabs in the default space were lost. Started browsing back through History Book and Surfed, but they weren’t that useful in this case. Then I remembered that I have an overnight Shortcuts automation running that backs up a list of open tabs to Drafts.app. Win.
And: just in case anyone might find the shortcut useful:
https://www.icloud.com/shortcuts/d2488437895d4c2aae9e487b7c333e35
Simple enough to swap Drafts out for any other app that Shortcuts can create a note/file in.