Not sure about the others, but AWS EKS support closely follows upstream.

Only recently they released paid extended support in preview, which extends support for an additional year.

EKS still supports 1.24+ as part of "standard support". Upstream only supports 1.26+ (upstream's policy is "latest 3 versions").

EKS also added support for 1.24 seven months after the upstream release date.

https://endoflife.date/amazon-eks

Aks is usually like one version behind, and they deprecate older versions every 3 months IIRC. In a one year window of versions, that's not necessarily long term at all. The upgrade process is surprisingly kind of okay though, which is already a lot better than what I usually expect from Azure.

GKE does Auto upgrade and enforces them.

You can't get a really old k8s version on gke

AKS has LTS: https://azure.microsoft.com/en-us/updates/generally-availabl...

Is GKE actually much more stable? That's funny if so.