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. While Merkle trees are commonly used in blockchain technology, there are other types of FIPs (Federated Improvement Proposals) that have been successfully implemented in various blockchain projects. These proposals may involve consensus algorithm changes, protocol upgrades, or other improvements to the blockchain network.