I've wondered about this. How much does the CO actually want to access more 76 seaters with the current trends at the regionals WRT reliability of operations and availability of a steady stream of pilots? We seem to be running 99%+ completion factor lately and that's normally pretty tough/impossible to do regularly at most regionals. Would the CS300 make sense anyways (more sense than that initial plan of grabbing the last 60-odd small old-gen 737s off the line), even if it didn't open up access to the 76 seaters?

Or separately, would a combo of the CS100 and 300 make sense to both open up the 76 seat access and go forward w/ the most fuel efficient aircraft in the low-mid 100 seat range?