(one of the 2016 4k models)
Passthrough with Dreamcast (PAL, VGA), SNES (PAL) and Mega Drive (PAL and NTSC) works, but the image drops every 10 seconds or so, making it unusable.
Anything from Line2x and up gives either an image shifted downwards by a random (?) amount of lines or a completely glitched image.
I suppose this is actually just a bug in the TV’s software since even the DVDO iScan VP30’s output is not handled right when setting it to 720p or lower.