Yes, I have noticed this too! What is up with 2030?!A few people have pointed out how, with enough money and will, a city can be built very quickly. Some examples:
1. Dubai, which Paul289 mentioned.
2. Neom, or The Line, being built by Mohammed bin Salman. With its climate control and everything in walking or autotransport distance, it reminds me of the dome they lived under in Logan's Run. Planned end date: 2030.
3. Mark Lore, of Walmart, wants to build a self-enclosed city in Arizona, Utah or Nevada. He's going to base the city on "equitism" and from the description it sounds sort of like some of the utopian cities that were built in the 1800s, except with much improved technology. Targeted completion date: 2030*.
Because these cities don't grow organically, with houses and work buildings being added over time as needed, they can be built much faster. Also, if you start with a basically abandoned or unbuilt area, you don't need endless permits (all done at one time) and you don't need to wait for anything or anyone. The speed of the project will be determined by how many people you can get working on it at one time. With enough money thrown at it, it can be done quickly. With something like Neom, there's no need for more blueprints; you simply make the same stuff over and over. Think of how quickly a McDonald's can go up once the permits are in.
*The year 2030 is very popular with WEF people. E.g., Govs Inslee and Newsom both want only electric cars to be sold as of 2030.