Outgrowing a Christmas tradition does not mean your family has to lose the feeling that tradition created.
Identify what everyone actually loved
Was it the surprise, the family time, the special food, or the fact that the night felt different? Keep that part.
Give older kids a role with authority
Let them plan the menu, lead younger siblings, choose the theme, hide a surprise, or photograph the night.
Replace passive magic with participation
A hands-on tradition like The Tomte Cake can work well when kids are ready to move from simply receiving Christmas magic to helping create it.
Do not announce the ending dramatically
Sometimes the best transition is simply to introduce the new activity and let the old one fade naturally.