If the sims 5 is free, the sims 4 content continuing?

I think many of us are hopeful that the sims team will continue to produce content for the sims 4 after sims 5 releases. Unfortunately that is not the way it has been done previously.
The sims 5 will likely be filled with microtransactions from day one but we will see. At some point in the future we will all have to decide if we want to move on to sims 5, keep playing 4 even if no new content comes out, or move on to a competitor.