> No land owner will suddenly become a developer to build an apartment block.

No one is suggesting this.

> A plot owner can sell land to a developer or form a joint venture with developer putting in their land as starting capital (much more risky) most people either keep land as gold or sell it when they need money.

Most people don't own vacant lots, but some who do hold onto it as an investment. It's a pretty poor one on average over time, just like gold (which is a good analogy).

> The very idea that everyone who owns land should build an apartment block is laughable, it is very complicated endeavour best not to get into it if you know nothing about it. Hell building a single family house is complex, let alone five story building.

Again, no one is suggesting this. The assumption is that a developer would buy a lot to build on, because that's what happens in practice.

> So you either keep it if you don’t need money or you sell it if you want to buy something else or need to have liquidity. And you don’t even sell it to buy other investment vehicle because land is already better than gold.

Land and gold are not better than the stock market over time.

> My plot increased 3 times in price in 10 years. Try to beat that with SP500. It’s virtually immune to inflation no matter how the broader economy fares it will always shield from inflation because you cannot make more land hah.

The S&P 500 beats real estate over time. Congratulations on getting lucky with your plot of land. Land is a good inflation hedge, assuming you are in a growing area. Ask rust belt land owners how things worked out for them.

> Even in utopia of automation and post scarcity society good location land will be truly lucrative and unimaginably expensive if not outright prohibited to own by private individuals. The question is what will be a “good location” in 30 years.

Thanks for highlighting one of the many issues with communism, but we will never reach a post-scarcity society for many reasons, including this one.