Why must we lose everything when we grew up?

[floramon]

Summary of Digimon:
No matter how many times the Digimon left his/her partner, the Digimon will somehow reunion or returns.

In short, there is no such thing as forever goodbye.

In 01 ending, Digimon and partners said goodbye. But they reunion in 02.

In 03 ending, Digimon returns home. But there is a Digital Portal inside Guilmon den.

In Digimon Hunter, Digimon returns home. But...dunno how they came back again in the last minute.