I've just finished the season. It's interesting how the show depicts a world that is socially and technologically stagnant. Our protagonist wakes up after 250 years and the only thing that is new to him is the use of the term "Meth" to indicate very old people.
That's not so unrealistic, actually. We assume that rapid technological progress is normal, but that's just because we happen to live in an era where it's occurring. Historically, periods of rapid advancement are the exception rather than the rule. It's more common for societies to achieve a degree of technological and economic equilibrium and remain there for a long period of time, until economic, environmental, or social conditions change enough to require major innovation. Then innovation proceeds until the factors driving it subside, and things return to a steady state. It's not "stagnation," just stability. There is still growth and progress, just on an incremental scale rather than a constant state of technological revolution. It's basically like punctuated equilibrium in evolution -- rather than constantly changing, species remain in a steady state as long as they're in balance with their environment, and only evolve into new species when the environment changes enough to require it.
For instance, China had the knowledge and resources to achieve an industrial revolution 700 years before Europe did, but they didn't
need one, because they were already prosperous and economically stable enough as they were. Any major disruptions in their way of life would've been counterproductive. But Europe 700 years later was resource-poor and being economically outcompeted by China and India, so they needed the Industrial Revolution to bring about change for the better. Sometimes change is necessary, sometimes stability is necessary.
On the other hand, it does make sense that the
Altered Carbon society is one that wouldn't have much change or progress. All the powerful decision-makers are immortal, so they like to keep things the way they are, maintain the status quo that benefits them. And the portion of the population that wants and needs things to change is oppressed and devoid of the means to bring about change. I suppose that does represent a form of stagnation in that instance, if not necessarily in others.