[FEATURE] The fill-first routing policy adds the option to lock a unique credential for each user.

[CyberRookie-X]

The fill-first routing policy adds the option to lock a unique credential for each user.

• When multiple users use the fill-first strategy, rate limiting for a single credential is easily triggered. Switching to a different credential triggers the rate limit again, and soon all credentials will also be subject to rate limiting. Credentials that have been rate-limited will have to wait several hours before they can be used again.
• The round-robin routing strategy will result in multiple times more cache writes.

[bash99]

As current codex status, this feature is much more useful.