The airforce doesn't change aircraft types for the sake of
catching up with the latest. Its only when they really need
to....
The NH90 is no major improvement from Super Puma/Cougar we have,
there's no need to change at all...waste money only. Capability
wise, Super Puma and NH90 is quite similar in terms of performance
and cacpacity.
And your serviceability problem is nonsense. It is extremely
reliable and still carry 10+ troops and underslung their
gear....they are very important tactical transports.
Downtime is extremely low. Your "heard" is rubbish.