During the IR course in a EFIS equipped aircraft you can ONLY use raw data and same goes for the skill test.
Very simple;
Why pay more to fly something old and tatty when you could fly something that was built this decade worth nearly half a million euros for less.
And I don’t quite agree when people say that its harder to fly something like a BE 76 than a DA42, it depends on the candidate. Ok with something like a BE 76 you have a few extra levers (mixture, props) , but you have a lot more complex systems in a Twinstar.