This is actually what Firedancer will do.

It will have a new client and as far as I know, only Ethereum has two clients.

But feel free to correct me if I am wrong.

Fardancer is a solana validator client but Farcaster works differently.

Check out /neynar , Farcaster clients are built on neynar hub infra and independent from each others.

PS: I am also running Farcaster hub(Node) using hubble. 

Link: https://www.thehubble.xyz/

https://warpcast.com/rish/0x68a9d9b5

Ethereum has many clients 

For execution layer: Geth, Reth, Nethermind, Erigon, Besu

Probably missing some

Searchcaster