The slides say that the NLB doesn’t support sticky sessions, but looks like they do: https://aws.amazon.com/elasticloadbalancing/features/
Yep, AWS has been adding lots of new features to NLBs and they are nearly the same as ALBs where as that wasn’t the case not too long ago. Looks like this feature was available starting in March of this year. We’ll get that slide updated.
This looks like the best place to see the restrictions to that sticky sessions support in NLB: https://docs.aws.amazon.com/elasticloadbalancing/latest/network/load-balancer-target-groups.html#sticky-sessions