Indeed, and one cannot say that Paint Shop Pro and Quark Express are hugely relevant in today's market.
Like many others, I do not have a separate file format for working and one for storing and have no plan to change that. It does not make sense, because I often go back to edits I made some times ago, occasionally I revisit old works and having to start all over would be a waste.
Insisting on making the afphoto a non-changeable default in Affinity Photo makes it totally impractical for opening a raw file and saving a file that any DAM can use. Period. And that means continued irrelevance for Affinity Photo because almost no pro will even consider it and most amateurs will give it a try, like I did, and only use it for a while until they realize the qualities of the program are not enough to justify the added inconvenience.
StephaneBosman got a reaction from Máté in File Format Specification