Affinity has in the last couple of years put Adobe on notice. Without going into detail, they have come up with a trio of interlinked products that is a one time buy and inexpensive. The problem is they seemed to have overlooked being able to load a curve for making digital negatives. I have a couple of times asked them about doing this in the upcoming release. I finally figured out the right forum section t go to. Maybe this time it may work.
If anyone here wants to prod them a nit, here is wheree: https://forum.affinity.serif.com/index.php?/forum/52-feature-requests-suggestions/

--Dick Sullivan HonFRPS