The upside of RSA is that we'll likely have evidence of ed25519 being breakable (~1500 qubits) before breaking RSA 4096 is possible (~8000 qubits). [https://cr

The upside of RSA is that we'll likely have evidence of ed25519 being breakable (~1500 qubits) before breaking RSA 4096 is possible (~8000 qubits). [https://crypto.stackexchange.com/questions/35137/how-many-qubits-are-required-to-break-rsa-2048-or-4096-with-a-universal-quantum https://crypto.stackexchange.com/questions/35137/how-many-qu...] The number of usable qubits in a single computation is expensive and has been growing slowly and until that changes I figure it's more likely to be surprised by a break of ed25519 but not RSA 4096 than to be surprised by a break of both.