I've been trying to use Snapshots since Affinity doesn't have Layer Comps and it's really tedious. In my case I'm making cards for a game. All the cards have the same background, but different stats and artwork showing. I've saved each card's configuration as a Snapshot with the appropriate layers visible. But now I realized I need to adjust the stats a bit and change some fonts from black to white. I'm having to edit each and every Snapshot, rather than change the stats/fonts once and then tell all the Snapshots to update. Layer Comps are the biggest feature I miss from my Photoshop days (and the ability to quickly export all the Layer Comps as their own flat file). Add this one feature and I'd stop pining for PS.