One of the reasons that I moved away from typical Western tv shows, and favour my BBC shows and a#kdrama, is the number of episodes and seasons. I like that things are generally simple with a Korean drama: beginning, middle, end. Boom. Done and dusted. If there is more than 1 season it is usually at the behest of the network and/or fan driven? And sometimes the extra season feels like that: extra and a tiny bit outside of the first, not as good. Although some feel like they could have used a 2nd season, eg #MoonLovers:ScarletHeartRyeo 😉
Unless it is a mystery/inspector series etc.. with the majority of UK shows, IF there is more than one season, the max number of seasons is 3-4, with 6-8 eps each. Again, done and dusted.
US shows typically have anywhere from 2-11 seasons and each season has at least 20 episodes. Characters in and out, highly formulaic (not that a kdrama doesn't have a formula) and after a while I get bored. Why not leave on an up like #TedLasso or #SchittsCreek?