The problem isn’t the maps being static and finite, it’s that nobody designs maps for emergent and dynamic gameplay anymore. CoD might have dozens of maps but they’re all designed for perfect sterile balance with the same lane concepts.

Some of my favorite multiplayer games have only 3-4 maps but each is distinct and plays well to different tactics. Usually they’re based around strong points and webs of approach which gives more options for fresh experience each time you play (“wow never noticed that flank” - “oh this window gives a great angle over this courtyard” - “oh a grenade can be thrown just perfectly over that building” - etc…)