Yup! Almost everyone in my upgrade class is no longer at OO. It gave us the kick in the pants that we kinda needed.

As for upgrading into a different airplane, no question that the mighty RJ is a bit more demanding in terms of systems knowledge and some procedures than the 175, for example the CA originating flows and FFOD procedures for the Deuce, which are quite lengthy. My reco here would be to get hold of the training materials early and show up to training with at least a basic understanding of the flows and systems. When I got the upgrade notice, I would show up early to every flight and spend a few minutes in the left seat teaching myself the CA flows from the left seat. My CAs were only too happy to help me learn that stuff quickly.

Also, for anyone with their heart set on a mainline career... If you think the mighty Canadian Reset Jet is archaic, just wait till you get to Guppy training. The RJ is a modern technological marvel compared to the Guppy. The RJ has a simpler and more logical approach to systems design, and the lack of an EICAS in the 73 leads to some head -scratching moments during non-normal procedures in which systems knowledge is essential. So for a 175 driver, upgrading into the less-technologically-advanced CRJ will provide a solid precursor to eventually moving into the dinosaur from Renton...