I was thinking about the same thing that if Yoda died of old age at 900 and Grogu is still on the level of a human 2-year-old at 50, Grogu will probably still be a child when Din dies. And I really hope the show will explore the tragedy of that.

Honestly, I doubt it will, if only because unless we get an epilogue flash forward once it wraps up, I don't think it's going to cover Din getting old. But I would like someone to bring this up in dialogue at least, and let the characters react to it.