Rotogravure cylinders are very expensive. Production of these cylinders typically take about a week and is frequently outsourced, reducing flexibility.
Flexo plates are cheaper, but still a significant part of the start-up cost.
Offset plates are by far the cheapest. Production can be done in-house and costs around €10-15 € or $/m² readymade. This is particularly advantageous when it comes to short runs when many plates may be required.