As I said, none of the alternatives for Linux meets my needs. I've tried all of those editors, I know Diolinux's patch as well. I've had the same conversation countless times throughout the years and every time people think they're suggesting me something new I haven't tried before.
I'm not saying the applications available for Linux aren't good. They are great for many photographers. What I'm saying is, they are not suitable for **ME and MY work.** I'm not a photographer who offers photo sessions and deliver small digital images. I sell prints through an art gallery. I print, sell and work on the same images for many years. They must match perfectly, it doesn't matter if I've printed them today or 5 years ago. They must be exactly the same.
Since I don't want to use Adobe products anymore, I will stick to Affinity, even though it's a pity they will not develop a Linux application. Maybe in the future there will be something I can use on Linux, but for now, that's not an option.