Two implementations, two records
The linked primary records identify versioned releases from the Geth and Reth repositories. Their source dates are preserved below. They establish that maintainers published artifacts, without establishing how many operators run them.
Separate software from network state
A software release and a network-wide upgrade are different events. To establish deployment, seek operator documentation and independently verifiable network information. To compare performance, use a disclosed workload and benchmark method.
A practical research path
Read each release record, inspect the changes relevant to your use case, and check compatibility guidance. Treat this article as a guide to evidence, not a recommendation to deploy or a ranking of clients.