tampere_gal wrote:well I don't want to comment much on a particular case when so little info is known. ... My qualm is that the option of living in the primary caregiver's home country isn't even discussed.
What we do know is that the parents in that case will have shared custody (that was written in the original post).
"Primary caregiver" is a concept of the last millennium, when often children were considered belonging to one of the parents (whether that was the father or the mother depends on the exact time you look at).
Today it is thought that it is considered best for children to have both parents, and one parent unilaterally deciding to move with the child to the other end of the world is therefore usually considered bad for the child.
tampere_gal wrote:It's simply illegal and out of the question. Surely there are at least some cases where what makes most sense is that the foreign parent and their extended family and the life the child would lead in that home country has even more to offer the child than Finland, as wonderful as Finland is. And for those children it's a pity it's not even on the table, up for discussion.
It is not illegal, but usually neither in the interest of the child nor of the other parent.
And child custody battles would become even more ugly if the parent who wins at court the "primary caregiver" role as you call it would then have the right to take the children away from the other parent.
When one parent is allowed to move with the child to another country, that basically forces the other parent to either give up the child or also move to that country.