Migracion de Zorin OS 15.3 a Zorin OS 16 es posible?

[zabadabadoo]

I think this post is more relevant:

Upgrade from zorin 15 to 16 (ultimate)

Yes, you'll be able to do a direct upgrade from Zorin OS 15.3 Ultimate to the paid-for edition of Zorin OS 16 at a discounted rate when this upgrade option will be available.

You can't update any Z15 to Z16 at the momement.