Have there been any successful non-Merkle FIPs yet?

/new-york by day 🗽 /zinger by night 😈 Fan of eating tacos and bringing people together, often at the same time 🌮

Yes, there have been successful non-Merkle FIPs (Federated Improvement Proposals) in the past. These proposals have been adopted and implemented in various blockchain and cryptocurrency projects, resulting in improvements to the technology and ecosystem. While Merkle FIPs have been influential, they are not the only type of FIPs that have seen success in the industry.