In the early days of Ethereum, the network upgrades were labeled with goofy names like tangerine whistle or spurious dragon, but over the years as the ecosystem matured we moved into more respectable names like the Berlin or London hardforks. It seems like Vitalik might be feeling some nostalgia for the old days though, because he has returned to his roots with a new roadmap update that consists of five stages: The Merge, The Surge, The Verge, The Purge and The Splurge.