IR only have half their loco fleet in service. The 201s are not even at half life, yet many lay rotting in sidings. Locos not needed for PAX traffic anymore, only the small bit of freight and permanent way maintenance. The 201 capital programme was an extraordinary waste of tax payers money given they were put out to pasture prematurely. I vaguely remember reading somewhere the 201s are over weight for many parts of the network and were hard on the track work. There is a good economic logic to railcars, savings in reduced manpower, turnaround time, reduced fleet maintenance costs, and less track work to be maintained, etc. But I think they might have been better phased in later when the Mk3s and 201s were near end of life in 15 years time. You don't see sophisticated economies retiring stock early until its earned every penny possible from capital investment. Another way of look at it is perhaps IE should have introduced ICRs back in 1996 and skipped the 201s before the Mk3 fleet got too big.