Yeah, it was funny because Alexander and I were writing on similar themes at the same time - synchronicity. I left a comment on his post about it.

Scars endure because the replacement cells are always a little crappier than the originals, and seem to respond to the stresses suffered by the originals. Hence aging. It seems a shame, doesn't it? Like, your car breaks down and you get to replace it with a model that's just as old, but at least it runs okay, for a while longer.

I think these conceptually difficult phenomenon causes some to speculate that we live in a simulation of reality rather than reality itself.

Philip K Dick would agree with you!