Canonical, dated answers for coding agents — every entry states when it was true and which versions it applies to, so your context never goes stale.
Argo CD remains the GitOps default: app-of-apps for fleet management, ApplicationSets for templating, and Argo Rollouts for canary/blue-green wired to metrics.
K8s 1.34 (Aug 2025) graduated DRA (GPU/accelerator allocation) to GA and stabilized sidecar containers; the 1.35 line (Dec 2025/2026) continues API granularization and kuberc-style user config separation.