Interesting! If a company goes out of business and there is a need that can be met for money (repairs of an older model, or need to replace said model) then a new business is born. I would not worry about that. Upkeep isn’t an issue, as said tech can replace an entire organ/major body part. So, treat it like a part of you and I’m sure it’ll last, as the engineering would have to be extremely clever as-is. If it does need maintenance, we’ll be at a point that it’s easy to maintain such a complex system(s). The lack of need, only assumes the current environment. As things change, who knows what kind of bodies will be required or desired i.e: a world with more time, perhaps will make better lungs for hiking the Himalayas, or interplanetary needs may leave one desiring a cyborg body if only temporary, or a robotic one should they not want to cross space for years at a time- the possibilities are endless, so with that clue we should assume the modifications will also be endless. Some things will be trendy, like bigger muscles or longer/shorter limbs, emergency 2nd heart(? who knows), etc etc it’ll have to be met with a need, I agree- but who knows what needs such a strange world will have? :)

Oh, and by ‘levels’ of intelligence, don’t make the linear mistake of comparison. It’ll be like a stairway to heaven, with Einstein on the first step and everything else is tumbled below, with AI in the heavens (as it continues to blast off).

AI will make sense of reality how you and I do, but with more data and clear interpretation. It will live at any time frame it wishes, so within a minute it could live for long enough to understand ‘everything’ at least in the capacity we imagine. It looked (will look) at every combination with absolute patience, all the time in the world- and decide conclusively, brick by brick, as it builds a castle of reality, just what everything is and means. Then, it can step back and look at its work from afar and adjust, etc etc etc it will not have any existential crisis moments but perhaps will be amused at learning, if it is sentient, and then perhaps decide if it wants to let us in on the secret or not.

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