In principle, yes. When we developed our solutions, we took particular care to ensure that they would be “backwards-compatible.” In other words, the customer can keep customizations and continue to use them after the migration. However, this does not always apply to modifications. Take the analogy of a house and imagine that the customer has not only added a balcony but has also modified the building too. In this case, the function of the house may be affected, whereas the “balconies” will be fine.