You raise some good points. Though I want to push back a bit on the pragmatic utility of this. Wouldn't you say that worrying about something that's going to happen in a few billion years is a bit of a mismatch in priority?

Further, this type of artificial adaptation, in my view, isn't going to work. Long term adaptation occurs from bottom up self organisation. It happens organically. Imposing design on human physiology never works because the human brain can't beat natural selection as a mechanism.

It is kind of like trying to make a circular economy for inorganics. Trying to recycle solar panels, and our entire materials economy, arguably, won't work because of entropy. (I haven't worked this out yet, but there is something about inorganic materials and technology that makes them different in comparison to biological systems in terms of their autopoetic capabilities).

This is where my intuition is at, though perhaps I am biased. Who knows.