Ethereum ($ETH) has launched a testnet for its transition to a proof-of-stake protocol, according to a blog post update from Status ($SNT). "This is a major milestone in the development of Ethereum 2.0," the post writes as it explains the Nimbus-to-Nimbus testnet announcement. The author adds, "…while stability issues persist and bugs will happen, the fact that we now have a Beacon chain synchronizing across nodes that aren't necessarily local to each other is a big deal."