How much lifetime do you think the Sims 4 DLC schedule has?

I am in no way an expert on this so maybe someone more knowledgeable can offer insight however, Epic's unreal engine 5 released this year. I believe the next version of the sims will release on that platform. If that is the case they may have began developing the sims 5 this year but I think it will take several years to complete. Thus my prediction of 3-4 more years. Again I'm not an expert so all of the above may be totally incorrect.