How long will ArcGIS API for JavaScript CDN will be available

Question

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 · Accepted Answer

Link to Product Life Cycle Grid

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

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).