One company does not have one requirement
A business rarely runs a single application. There is the system the order flow depends on. There is the store where drawings, quotes and contracts live. There may be a controller in production whose only job is to keep running. These differ in almost everything that matters to the decision: where people work from, how much data moves, how fast a fault has to be answered, how badly a standstill hurts.
A decision made in principle assigns all of these the same answer before any of them has been looked at. Sometimes that fits. More often one application ends up in a place that does not suit it, and the consequences surface later as day-to-day friction that nobody traces back to the original choice.