I kinda understand the frustration, but isn't it a bit early to give up all hope? KC:D is not going to be released on any platform for another 6 months at least.
My concern is that the more people request a refund now, the less incentive there is for Warhorse to deliver on their promises, as all the potential Linux (and OSX) gamers already dropped out.
Now, I don't want to excuse or defend WH; I'd rather have a definitive "Yay" or "Nay" now than being kept in Limbo until eternity. So the ball is surely with them, and they constantly keep dropping it .
One thing that has given me some headaches lately, however, was a part of the interviews here: http://wccftech.com/kingdom-come-deliverance-targeting-1080p-on-ps4-warhorse-is-already-looking-at-neoscorpio/ :
Is Kingdom Come: Deliverance running on the latest CRYENGINE V?
We have the latest version of CRYENGINE 3, which is way more advanced than CRYENGINE V. It’s a bit complicated, because we have the paid CRYENGINE version from before they released CRYENGINE V.
Maybe if we were to start again right now, we would consider using it. Now, we don’t consider it at all because 3 is a bit more advanced than the V, and it would be a big trouble to make the change.
While official Linux support has supposedly been added to Cryengine 3.8.1, I am somewhat concerned about the level of support Crytek still offers for this older engine branch. Will the Linux render path be further optimized and adapted to changes in the Linux graphics stack? Will it ever gain Vulkan support? All of those seem vital in my book to offer a quality Linux port.