My - possibly limited - understanding of the issues for ash ingestion is that it gets into the cooling channels in the turbine blades, melts and block them. Then the first (and most expensive) turbine stage melts the next time it hits high temperature/power, leading to a very significant performance degradation and a very large invoice from the engine manufacturer.
In this picture, if you have a machine that tells you to inspect the engine before it gets very hot again, then you may save a great big bag full of money.
On the other hand, I can see a whole lab-full of Norwegians laughing hysterically as they all head down to the bank to pay in the cheque from easyjet.