There's plenty of 175 flying if you hold a line. The reason guys want to come over is because of the vastly better trip quality in the 175 and the lower block hour requirements.

A typical CRJ 4-day can involve 20 legs (my record is 23), crediting 18 hours. Given that CRJ guys are being required to fly 90 credit hours per month, some quick math shows that many CRJ guys are getting 11 days off with 90 hrs credit.

On the 175, a 4-day might involve 8 legs with 25 credit, with a requirement of 75 hrs/month. So you're working 12 days and off 18 days, while the RJ guy is doing just the opposite.

As my buddies on the 175 tell me, "It's like a totally different airline."