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In theory, yes. But these things only go so far. For instance, I built a new computer this year. I'll be able to upgrade almost every component for the next few years, but then Intel's pinsets will change, DDR5 will become the standard memory type, a new PCI standard will come out, USB4.0, etc. And at that point I'll be forced to buy a new motherboard. And buying a new motherboard is metaphorically equivalent to having surgery to insert new tech in to my body that the implants will need to interface with.
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I put forth that the primary cost for these magical space limbs will be for implanting tiny receptors or transmitters that interface with your nerves, and thus the 'upgrade' aspect will be about maintaining high-quality nerve conductors on a bi-annual basis and selling the actual cybernetics on a more consumption friendly platform similar to cellphones and eventually, like video games. Get a new implant every month. Every week. An arm for every hour.
This is assuming that the driving force for cybernetics will be about actual integration to your nervous system and not responding to muscle flexing, in which case it will be focused on range of movement, comfort and features.