Bummer, feels like stepping back in time to the days/years we waited for PS to have such a feature. Hopefully Affinity will adopt something similar. If we could save and edit History without affecting other steps in that history would be incredibly valuable. The only way around this would be to save several images after adding a filter in each, like saving my steps along the way. This combined with saving multiple custom filters in NIK may be daunting, but the only way around it.
When editing my images in PS I'd always create a Smart Layer ("Convert to Smart Object") that would allow possible changes at a later date. Kind of like an editable history, but for individual filters like those in the NIK collection. Can I do the same in Affinity Photo? If yes, where can I find a tutorial that would show me how? If no, is there a similar work-around?