When you consider the features of PLA 2.x on the one hand, and those of PLA 3.0 on the other hand, you might want to switch sooner rather than later. And that is where the migration feature comes in.
It lets you migrate productive assays from PLA 2.x to PLA 3.0. You can then continue these assays in PLA 3.0, benefitting from all the advantages this software has to offer. For example, when you are using the control chart function or the equivalence margin development of PLA 3.0, having a larger assay archive available will almost certainly improve your results.
Migrating your assays will also put you in a position to retire your PLA 2.x installation without losing any important data.