True. But for most the warriors are warriors for there lifetime.
No, which is why I said 'Dark Ages.' The RecGuides have given us a few notable pilots of warriors who had been retired from any military service and test into another caste. With the Stoned Peace, it does make some sense b/c besides cutting down their Bloodname counts and touman size they would have to cycle out 'old' warriors another way. Combat tempo would have also dropped in that period so you stood less of a chance of getting rid of solahma in the traditional method.
To the OP, some mitigating bits to age in descending order-
Be a Bloodhouse Leader
Have a Bloodname
Have high rank- Galaxy Commander or Star Colonel
Have a passage in the Rememberance
Be a warship CO
Be in a Keshik or Frontline formation
If you are Snuffy of the Star Adders, scraped by to get a kill in your initial Trial of Position, assigned to some garrison Cluster that shared a enclave with a frontline prestige cluster, just pass your annual Trial of Position, fail to win a spot in a more active cluster, fail to be nominated for a Bloodname, fail to gain rank . . . well, you are getting shuffled off by 30 if you are not dead.