I own a respectable machine. (intel i7 980x - 4.2ghz)
Even with total of 12 cores + 12 Gb mem + GTX480 + RAID 0 (4 hdds) the Hitfilm simply took almost 1:20 hour to render 30 seconds using "motion blur" in the same test of "missile smoke tutorial".(1920x1080 - MP4)
I saw that this was because the program only used 2 cores for a total of 12 cores.
I also noticed that the Hitfilm used only CUDA system.
In edit mode, each frame was carrying more than 3 seconds.
PS.: This all happens even now using version 1907.40247