How long will ArcGIS API for JavaScript CDN will be available

BillBean

I was in a session and was told the following about WAB retirement:

AGOL --> No

 

Enterprise --> will follow the Product Life Cycle of 6 years to retirement.

 

Developer Edition --> Yes, in 2 years it will follow the Product Life Cycle of the API of 2 years to be retired.

Question: We are using 3.28 API on a custom JavaScript application that uses CMV. How long will the 3.28 CDN be available for use?      

Thanks..

Detteor

Link to Product Life Cycle Grid 

Also at the bottom of the page in the notes section it says:

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Retired API releases will continue to be hosted on our CDN for the foreseeable future (so apps built against retired versions of the API will continue to work).