Flying Glass, especially G1000 is infinitely safer in the long run. Yiu have a huge horizon, a HSIthat yu dont have to reset like a DG, HDG bugs, speed and ALT trend vectors, moving map, you can have the nearest airports displayed in a list. Also ALT alerts. it all means you can fly more accurately, you always know where you are, you literally cant get lost with a G1000.
However, if you cant fly in the firstplace, the G1000 wont save you. To that effect, I do the first half dozen lessons with the screens covered, get them flying visual attitude first.
The G1000 doesnt make a bad pilot a good one, but it does make a good one even better due to the increased situational awareness.
As for IFR flying, its just the bees knees, when I started flying 23 years ago I woudl never have dreamed of a C172 with a flight director.