No once x10 is finished everything thats new in it that can be ported into x9 will be done for example the new AI system will be in x9 sometime after they finish x10
Quote: "discontinue x9? "
So no
yes the model packs are great additions and make game more unique and interest they are all quality assets. Model packs are being made all the time you may or may not know that at least half the "offical" models packs were made by the community not the game creators so yes mroe packs will come over time you could even learn and make you own.
And Welcome to the Forums
Thanks
Adam