Theory on The Sims 4 Seasons

I think the real reason we're not going to see stuff like Seasons or Generations (no toddlers) is that the game engine is extremely limited and they CAN'T do those without redoing the entire game. How would seasons work with the set backgrounds? They'd have to do a custom background for each world and each season. While this is possible, it seems like too much work for them to bother with. I also doubt pets will be released, ever. Pets would require new animations and ways to multitask. If they did Pets but not toddlers, that would create a firestorm of controversy on the forum and elsewhere. So they'd have to do toddlers if they are going to do pets, and they aren't going to do toddlers because of the difficulty of programming carryable toddlers while multitasking, which is why babies are restricted to the crib as objects in the first place. This indeed is a new type of Sims game, it is very very limited as to what can and can't be done.