Hm. I hadn't thought about the maximum data storage of the brain. That's a good point - it kind of changes things, doesn't it?

As for change, I don't think that we're incapable of it, just very resistant to it. If you end up in a situation where people routinely live, say, 1000 years and there are very few new births (a product of demographic shift and of measures which would have to be implemented to prevent overpopulation in an immortal society) change may well slow down due to this resistance. That's a worry, I think.

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Quaeso quousque humi defixa tua mens erit? Nonne aspicis, quae in templa veneris?