Hi Maximilian
It is possible to replace on old server with a new one uisng replication.i have done this sucessfullly on more than one ocassion. ( We moved 4000 cleints from one server to another using replication )
The link that you have mentioned says that "YOU WILL NOT BE ABLE DO REPLICATION AGAIN" . If you want to know why replcation will not work let me know i will PM the reason.
Replcation is on alternative that has been suggeseted to the customer as per his question. there are 3 more alternatives that are there the Customer can select any one of them.
But the important things is REPLICATION WILL SERVE THE OBJECTIVE