The performance of RK3399 is very good and if you do not play Windows games, it is able to replace the average home PC with Linux. Even without the addition of HW support for full-screen video, (in SW mode) the rk3399 works seamlessly with the 1080 desktop in all modes and without brakes. Conclusion about the unsuitability rk3399 Linux - sheer stupidity or intentional deception. But it is important to understand that to get all the performance of this powerful processor, it and the whole system needs a good cooling system and a good medium (the device from which the system starts). Only in this case rk3399 will be able to show all his abilities. For example , you can take a shitty SD card and then yell that the system is slow compared to the Android system that is run from eMMC. Or use a bad cooling system. The main disadvantage rk3399 , it is a heat at work, but with the release of rk3588 is significantly change.