DEFO Pax AND RA60. I don't think that I'll ever get into the RHS let alone the left. Sigh...
RA60 is a real threat to career progression. Unless the expansion continues at the current pace for the next 10 years, it's probably safe to assume that command upgrades would be delayed by more or less 5 years once the expansion slows down.
Also, someone correct me if I'm wrong, but there's a large number of catB F/O that will eventually have their 2nd try at the upgrade (200?). Consequently, the time to a command course is already set to increase to more than the current 10 years for every F/O and S/O who are not expecting a course within the next 3 or so years.
For S/Os, DEFO and RA60 is a double whammy. All of this combined could push back commands to 15 years or more.
I hope someone will tell me that I'm wrong!