If a society achieves the point where there is so much "plenty" that the society does not need a "marketplace" to allocate goods and resources, then capitalism will disappear for those specific commodities, but not for "time".

And even then, it won't be replaced by socialism, which is just a different option to allocate limited goods and services using a coercive means versus a marketplace. In other words, both capitalism and socialism are built on the premise that goods are limited, they differ on how best to allocate them. Who needs government to allocate resources when they are unlimited.

So, what is the real difference between capitalism and socialism?

Capitalism harnesses the power of selfishness to produce more goods and services and that raises the standard of humans overall. It is why every socialist government in the planet has failed when it could not find a way to preserve elements of capitalism even in a socialist economy.

Socialism was purely a response to the idea that capitalism while producing "prosperity" is not necessarily "fair" as defined by allocating consumption more evenly by disconnecting it with production. In other words, rather than saying the person that produces ten times more should get to consume ten times more, socialism tries to allocate things on a more equal basis (today's lingo is capitalism rewards merit and socialism focuses on equity).

But Orwell's thinking was wrong. He thought in terms of goods, but goods are nothing more than an expression of time and resources.

The most precious resource on the planet is someone's time. Until we learn to "cheat death", we need a reason to part with our time. For many of us (I am one of them), we realize late in life how precious time really is. Instead, we tend to let it slip by until we realize it is almost gone.

So, when I purchase a cup of coffee at the coffee shop, the vast majority of the cost of that cup of coffee will be distributed to the various people who worked to get the coffee beans to the coffee shop and the people at the coffee shop that turned those beans into a delicious drink. Only a small amount of the purpose price will go to the owner of the coffee plantation for the minerals taken from the soil to grow the beans or the other non-labor resources consumed along the way. But the time of every person who "worked" to provide that cup of coffee for me is lost forever. So, why did they do it?

Because like me, they want to enjoy spending the money they earned for selling their precious time to consume someone else's time, perhaps the time of the baker making a delicious loaf of bread. Why sell your time rather than do everything yourself. Some people do that, but of us find something we are good at, or at least good enough at, to sell our time and buy stuff that other people can produce for us that is better than we would have produced or that we value less than using our own time to make it.

But it goes beyond just consuming other people's time, we want other people to spend their time making things we want, no just spending their time making stuff no one wants. Had I dedicated my life to producing art no one wanted, I would have starved, people would not have parted with the money they earned selling their time to buy my art, that they didn't think was worth any of their time.

So, while Orwell was right with regard to commodities, he was wrong. The relative value of commodities is impacted by their availability and if all commodities were available in unlimited amounts the price of commodities would collapse to zero and we would not need government or the marketplace to allocate them. But until we live forever, precious time and the ability to "trade" in the marketplace or have the use of your time dictated by government will continue to require an economic system to exist.

Socialism tends to be attractive to people who feel they will do better when government allocates how they should spend their time and what they will get for it. Capitalism works better when people feel they will get more selling their time in the marketplace and buying the time of others in the marketplace than if government decides how that will work.

And the real question is which system rewards people for spending their time best, since how people spend their time determines what is available to buy as compensation for spending that most limited resource in the world... your time.