The X3 produces very poor 4K video due to not only the throttled bitrate but also the dreadful GOP structure and intraframe pulsing every 8 frames. This is a fact and not a subjective interpretation so I think your comment stating the X3 "produces awesome 4K imagery" is a little far fetched.
I have noticed a trend with most of your posts (I have looked back at many of them), and nearly every one of them appears to be aggressively asserting your condemnation of either peoples opinions or telling other forum members they do not know what they are talking about.
However, you do not back any of your statements up with coherent arguments giving any technical reasoning and yet you claim to have been 'in the business' longer than most people ever will be.
Perhaps a little less aggression and fewer scatter gun approach of posting "its rubbish, don't waste your money, no TV image will show the difference, grading is a waste of time, there is no such thing as 2.7k" etc will go some way to gaining some respect from other forum members.