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I am also on the minority here asking for Linux versions of Affinity Photo and Affinity Designer.
 
If you ever decide to go for it, perhaps you should talk with Ubuntu/Canonical. It is by far the most popular distro and besides the Appimage format (that someone mentioned earlier) Canonical has developed the universal Snap format that can run on most Linux disros and it is constantly updated by the developers who make it available. (See https://snapcraft.io/)
 
There is really no adequate photo manipulation/vector editing programme on Linux. Gimp is unbelievably complicated and still lacks CMYK support. Krita -even though I really like it- has more odd crashes than it is acceptable. Inkscape also has an unintuitive interface and lacks several important vector editing features.
 
Surely there must be at least 10,000 Linux users who would be willing to buy your software so that you can recoup your initial 500,000 $ development costs.
 
I'm one of them. And I'm sure you could get the Linux press behind you. You already have great reviews everywhere I look and graphic designers really don't like to change their habits to much.
 
But Adobe seems to have forced some people to look elsewhere. The subscription model is a big reason. Also the latest versions of Photoshop and Illustrator are a bit flaky around the edges. They keep changing things they shouldn't that complicate people's workflows.
 
On a final note I'm a print and web designer. Been using Adobe since 1996 and moved to Ubuntu because I got kind of fed up with the latest MacOs (how older programmes stop running in newer versions) and Windows 10 (Microsoft can keep its telemetry to itself).
 
It's not cool having to use a Virtual Machine for graphics work, but still Ubuntu makes things much easier for someone who also develops websites and I am not willing to go back to Apple or Microsoft.

Xara?! Seriously. That's an old can of worms you opened and it has nothing to do with selling a graphics app to Linux users.
To refresh your memory please visit: https://www.linux.com/news/lessons-learned-open-source-xaras-failure
 
Other than that. Your suggestions are noted.

Didn't say they're unusable in my first post. I said that they're not adequate. That's a big difference.
 
And I do use them for certain things. For example I really like painting and drawing with Krita and the G'MIC filter for coloring artwork in Gimp is awesome.
 
I am open minded about new tools. And don't expect them to be like Adobe. I've used Pixelmator in the past (it gets the job done but doesn't have CMYK either).
 
IMO Graphics apps should have some functioning core features (like proper type handling, CMYK etc) for print designers.
 
Print will not go away in our lifetimes. No matter what they say.
 
Affinity seems very promising. That's why I bothered posting in this thread. Even though they made it explicitly clear that there will be no Linux versions.
 
Also I understand your last point. But it's not my job to look into Linux market stats. No way! Got better things to do with my time. LOL!
 
Guess that if I ever go back to Apple I'll give Affinity a spin.

https://forum.affinity.serif.com/index.php?/topic/3353-multi-linux-seriously-now/?p=182100
"By bringing DaVinci Resolve and DaVinci Resolve Studio to Linux, customers can now take advantage of the most robust, extensible, and reliable platform available."