My grandmother is 100 years old. She has led an incredible life filled with all kinds of achievements. Her passion for reading, learning, languages and art, have all shaped me. She’s blind now, and basically deaf. She can no longer read, which is very painful for her (I can read to her when I visit). How much value does she still have? To me, as much value as she ever did.
What is her identity?
Neither is likely to be a much richer channel than the other, I think.
The odds of those around you noticing is something you have some power over, if you're thinking about it ahead of time.
I'm not saying not to plan around Morse, just that it's a little early to assume there must be no other hope - and always too early to place much faith in being able to exert control over circumstances where, more or less definitionally, this is not a reasonable thing to expect.
That probably sounds scary. I can't help that. Dying is a scary topic, I imagine likely much more so for actually doing it, which I as yet have not. But I do know some things about how to handle fear, and one is that it helps a lot when that doesn't come by surprise - when you don't have to start totally from scratch to build what equanimity is available.
Less so than any one specific response, what I'd focus on trying to prepare for is that. You can't really know what tools you will have available in such a moment. You can't really know you will have any. Whatever there is, though, you'll have an easier time to recognize and use for being able to better see past that fear.
That's not everything, but it says more than you might yet have realized.