But having a debilitating disease is a different story and beyond the persons control.
Given a choice, I and many others here will continue to learn and adapt.
The subset might include you, or a majority of HN people even. Just a smaller % of population than currently.
Regards your > Given a choice
If you have family with such issues, you know it wasn't a choice. Getting older means facing mental plasticity slowdown. You can work to be fit on that front sure, but it is an issue that we will all face and not everyone will choose as you do.
I am not sure I agree with GP's assertion that technology will be inherently harder to deal with though.
This issue can not be decided based on what is appropriate for a niche segment of society. We have a variety of options to serve the general society -- state/control, state/licensing, state/regulation, private/corporate, public/ngo, public/community, personal/ai, personal/expertise. These are not mutually exclusive options and we should discuss the possible configurations, optimal for general societal welfare, rather than denying that the problem exists.
One possibility that comes to mind is that we could possibly rely on trustworthy AI to help us understand the implications of using X in full. So if not walled gardens maybe private landscape architects or AI gardeners.
But one of the two will be required for digital life.
Even today it is not ok to be careless with what you put on your machine, but in a couple of decades, it could be a true disaster, specially if public services are fully tied to your digital identity. You would not want your digital self to be entertaining any random* program as guest.
* effectively random - see first point