One of the things I'm missing from Affinity that I can do in Deep Sky Stacker is the ability to Save a file list of images that I will stack.
This is very useful as once I have combed the images and de-selected the duff ones, I would like to be able to save out that file list for recall later - image/flats/dark flats etc.) into a single file.
I can then start a new stack from Open file list and add additional data to it from later imaging sessions.
Otherwise, I have to comb the whole list again from scratch which is a laborious task!
This is the UI from DSS - simple but very effective