Of course they will be around. Just as Jetstar will be. The egos of those at the top of both airlines will not permit them to fail. Both airlines have big brother airlines operating internationally.
I think 7-10 years for a command is a little on the high side. Remember there is no seniority to choke up progression. They have been losing a trickle of FOs to overseas contracts once they have some jet time in the log book. Agree that DE Captains are not going to be needed in the forseeable future.