Given the fact that 40k lore goes back to the present day and before that (the emperor as an immortal being exists way before the 21. Century), there's a lot of room between you basically live in the same situation as before (just with a living emperor in your timeline) and you're very much fucked (living in the 41. Millennium)

[–] Gorgritch_umie_killa@aussie.zone 2 points 7 hours ago

I'd imagine the jackpot would be waking up in the Dark Age of Technology.

Most soul crushing would have to be waking up as part of the Interex as they discover the Imperium.