Diller

Sure it is. As it is irrelevant to complain about a software not existing on one platform on a forum. It is just about frustration impatience and irrelevant sense of injustice. As hifred said address the makers, here you're just feeding the troll

It seem we have an Adobe Troll :D , AF must be very important in deed.

As one of the Affinity developers I want to try put this thread to rest.
 
Firstly, I want to say that there is no point in anyone making any assumptions about our strategy or how we have chosen to implement our technologies.  As Matt and Andy have already said, we have written our core libraries completely from scratch, using a wealth of knowledge and experience from our collective past.  That includes taking what has been learnt from our Windows apps, but not necessarily reusing old technology directly.  Also, as has already been explained many times, Affinity is a whole new beast - there will be no trickling of Affinity features back to the Windows Plus range.  These are two completely different sets of code.
 
Our main Affinity libraries have been written to be completely platform independent, but this has multiple benefits even when dealing with just one OS since the bulk of the code isn't tied to any particular technology that the target OS owners might be pushing (or change outside of our control).  Our libraries are in efficient C++ and not closely coupled to specific OS features.  The APIs we do use are generally C++ standard and are not likely to change.
 
Only our front end is tied to platform specific APIs. This is usually where the performance of any application is challenged - the presentation layer.  This is the reason for keeping the majority of our application logic out of front end code.  If Apple chose to completely change their APIs, the knock on effect to us would be minimised.
 
@hifred - It's true, there have been cross-platform frameworks that allow programmers to write just one code-base (I have used them for over twenty years), but they are generally slow and give applications a very lowest-common-denominator feel.  We are trying to produce a professional application, and want to be in control of the speed and quality of the application right the way through.  The benefit to our users should hopefully be very clear.

hifred,
I am shure there are good reasons. As is said in this article:
 
 
There are quite some technologies in OS X that are not available on Windows, things like Grand Central Dispatch, Open CL and so on. Without being a programmer I guess it is not easy to squeeze every possible optimization out of both systems while staying 100% compatible and featurewise identical.
 
Especially for Mac users history has shown that applications running on both operating systems don’t take advantage from technology that is only available on one of them (read: on OS X). Thus from a Mac user’s perspective quality would likely suffer and probably less people on the Mac side would buy a non-optimized Affinity Designer.
 
Adobe once was a great company. I think their decline in software quality (not in $) began as soon as they decided to go from Mac only to cross platform. Yes, they own a bigger market today and probably had to go this way albeit so many people have grown to dislike their bloated products and attitude.
 
Switching back to Affinity: From a marketing point of view it is a very good idea to stay focused and debut with a product (or a suite) that is the very best it can be on a given platform – even more so when competing with a de-facto monopolist that wants to be everything to everyone. I’d prefer a Mac speedboat over a cross-platform battleship anytime and surely I am not alone.
 
If the Affinity products will succeed in the Mac market (which I am sure of), Affinity can still decide to take the Adobe route and go cross-platform for the rest of the creative pro market.

"all the proprietary stuff"
 
Sure, it's well known that Microsoft is the most open source software. You can find the code online, they have plenty of succesfull open source project widely used and they don't use proprietary file format. You can even install Windows without online registration and serial numbers. Wait....
 
 
Not only this but it's well known that Mac users are more willing to pay for software meanwhile Windows users will try to pirate it first. (kind of the iOS vs Android story).

It seems all people user here, and especially Windows user know the market better than any other person. How arrogant and childish attitude. Remind me of the video game war between platform/brand.