[@Eneui] Technology by the point where the characters would have been frozen had a decent synthetic technology available to all. As in a replacement would be sufficient for a few years without maintenance and robotic limbs were at a level where they had become viable and were able to function at a level equal to that of human limbs. The process was expensive, however, and most people would only be able to afford limited amounts. 

Saying that the world in which the characters have awoken has progressed significantly since then and it's entirely possible to find far more advanced tech, operating at a far higher level of that of a human.