I think they should move on to the sims5, even if they will go on with the sims4 for many more years it feels like they have reached a limit for what they are able to make.
I do hope that they will not just make another sims5 though, but that they will improve the sims so that it is able to give the fans what they want, while they still are able to make content that they want to make as well. If they are taking the sims5 online, then I hope that it's a separate module and that the normal singe player will not receive less content.
I think that they should assign multiple studios to work on the sims5, that could help with them making more content and also making what the fans want.
