Judder is more noticeable on oleds due to their fast response time. You can either try to get used to it or use Trumotion to smooth it out - but this can cause soap opera effect and artifacts (I have an LG B6 and use Dejudder at 4). LG's 2018 Oled TV's have Black Frame Insertion (Motion Pro under Trumotion controls) which is great for improving motion but reduces brightness a bit and some people notice flicker.
What I still don't understand, and can't find definitive answer anywhere is: why some movies run amazingly beautiful-smooth, and other have this stutter in the back of slow moving shots? What is the difference? Encoding format? Framerate? PAL/NTSC source of bluray? Yesterday I watched super smooth StarWars on my Apple TV 4k, then, later You Were Never Really Here bluray rip was super stuttering. Tried playing with trumotion, and, if I set it on 1 or 2, it's ok for 10 secs, then picture hang for a milisec, twitches, and then again smooth until it happens again after 10-20 secs. Without tru motion, there is stuttering.