Do any of you have mods enabled through the mods menu?
Do any of you have base override mods in the Data folder?
I would imagine that base override mods are problematic because the game has to override very large datasets, even if only a few things are changed.
I found that converting my base override mods to actual mods reduced my loading times significantly, as in enough to play. "Continue" is still pretty slow to start, even if I'm just loading into The Hold at 0h5m, but at least it completes loading.