Years to EOL (Lifecycle) of part - EPCQ16ASI8N

Nobody can tell you this in public that knows what they are talking about.

Intel might give you some info, but only under strict NDA.

Even then there are a lot of caveats, customer order volume being the main criteria.

Intel will phase out parts when the orders dry up or it becomes not possible to produce the part at a profit.

Or maybe the technology becomes obsolete and the fab shuts down.

For any critical parts in your product you are wise to use multiple sourced parts when possible.