Dear community.
I received this notification:
We're retiring AKS version 1.18.x on 31 July 2021. We've detected that one or more AKS clusters in your subscription(s) are using Kubernetes v1.18 or lower. We'll continue to support clusters running AKS v1.18x until 30 July 2021, after which AKS v1.18.x will be removed.
And I am seeing this on the official documentation here.

What will happen after July 31st 2021 with aks clusters which keep the 1.18.x version?
Do they will continue operating (but of course without support)?
Or if by the time of 31st July, those will be automatically removed from subscriptions (I think this is not feasible right?)
I've wanted to ask this since I have a production cluster, which one has some legacy helm charts deployed which ones only work with 1.18.x version, If I upgrade the cluster to 1.19.x, those helm deployment will be breaking.
Of course, this is such a situation I need to fix by upgrading the cluster and upgrading the helm chart versions as well, but this is something to evaluate if can be accomplished before 31st of July.
Can I leave my cluster with 1.18.x version after 31st of July, whereas I got enough time to perform the corresponding upgrades I need to do?
If someone can give me a bit of orientation, I will be appreciated.