The most likely deployment is:
- 2x RSA + 2x ECDSA live soon after the ceremony
- 2x RSA + 2x ECDSA to get swapped in after ~1 year
- 1x RSA + 1x ECDSA held in reserve in case of emergency
But we're not making guarantees at this point, and this deployment strategy is one of the things we're willing to receive feedback on.