>>214295838 (OP)
I've seen journos say late 2026 (delusional), early 2027 (less delusional but still delusional) and mid 2027 (probably the most realistic).
I'd go with summer 2027 so a little less than two years, unless a strike or some other shit like covid happens again to delay it which isn't that unlikely, so might be another 3 years from now like season 2.
If netflix is smart they end it with season 4 before all the "teenage" actors hit their 30s, and then do spinoffs until the well of money dries up.