This page is always a good reference to see what support we have and how long it's valid for:
https://support.sas.com/en/technical-support/support-levels.html
As mentioned, latest version of Base SAS, M8, is currently supported fully to February 2028.
After that it will likely move to Limited support, not getting new hotfixes, updates, etc. But will still get limited technical support until completely retired.
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