There seems to have been (I’m not sure about the timeline since I watch dramas from different decades all the time) or is a trend for noona romances which I love. The one I can think of released most recently might have killed it off. Much as I like them, there’s something a little creepy about a 50 year old with a 19 year old, or whatever the exact age gap was. It doesn’t matter who the male/female role goes to. It’s macking on someone your grandparent’s age.
It seems like a theme starts trending and then one writer after the other starts repeating it and making it more and more extreme and ugly/stupid (in order to be different?) until they’ve killed it off. That’s annoying.
I don’t care for time travel themes much – it’s difficult to get right and my practical brain starts telling me who wants to live in the past and give up modern plumbing, women’s rights, transportation, the internet! If the time jumps are minimal it can be hella confusing when one is reading translations and not a native speaker.