In a message to tech@, Theo de Raadt (deraadt@) wrote:
We intend to only build syspatches for one release in the future. Errata patches will continue to be generated for 2 releases. The reasoning is syspatch on 2 architectures for 2 releases requires 4 machines, and therefore twice the handholding. It seems better to keep the time available to start doing syspatches for more architectures.