[James2001]

Far too many issues happen with interlacing these days anyway, really is incredibly awkward to work with in the digital world, definitely a relic of another time. As well as the swapped fields, you also often get things de-interlaced when they shouldn't be (UKTV, I'm looking at you!) and other sorts of artifacts like the mouse teeth/banding. Really interlacing is something that should have been moved on from by now... UHD is entirely progressive, but it's a long way from being standard. I think some broadcasters in other countries are using 1080p50/60, and quite a few have always been using 720p since HD began, like Fox and ABC in the US, (though I think much of the programming is still made 1080i and converted), and there was the time several Australian channels used 576p50 and rather midleadingly claimed it as "HD", but interlacing is still heavily ingrained.

I've been using 1080p50 for my filming projects for the last few years, and it's fair to say it's a hell of a lot easier to work with than 1080i!