The fact that you have to spell that out for some gamers is quite baffling. I mean, such an alien concept to actually finish a game and move on... what novelty.
This seems hard to grasp for some life service disciples but if you think how much (or few in most cases) meaningful content is released in these games... it's mostly collectables and cosmetics to keep you in the treadmill and to suggest you get something of value, stretch your gameplay so you're more prone to spend money on digital deadwood. But real content like new gameplay mechanics, new stories, new areas, new interesting characters to meet... that's not gonna happen on a "seasonal" basis and even if so, it's okay to stop playing and wait for such content.