Kubernetes 1.8 landed at the end of September and it's still working its way through my feeds, so I'll add my tuppence. The headline for me is RBAC moving to stable, which is the bit I actually care about. Role-based access control being a beta toggle you had to remember to flip was always slightly nerve-wracking on anything you'd let real people near.
The temptation with a release like this is to upgrade the moment it's out, because the changelog is exciting and the new thing is shiny. I've learned to sit on my hands. A cluster that's quietly doing its job is worth more than the newest minor version, and upgrades have a way of surfacing the assumptions you didn't know you'd baked in.
So I'll read the notes properly, watch other people hit the sharp edges first, and upgrade a fortnight from now when the dust has settled. Boring, I know. But my pager stays quiet, which is the entire point.