Like the P-40 will ever see use in MA.
Like the introduction of the Panther or Tigers will affect ground warfare in AH.
Like the SpitXIV gave a reasonable alternative to the 1942 Spitfires. (for 60 perks?)
..
We may not 'need' a K-4, but then again, we don't really 'need' anything else.
We never really 'needed' to improve anything from AH Beta.
...
The number of planes are totally irrelevant whether a plane should be modeled or not. All it can say is "maybe later, but just not now." And that's definately the case with the K-4. As long as history admits it, all planes are on the list of coming AH versions(I like to think so). Just a matter of priority.
Would like to see it in the future, but other things seem to be more urgent.