This is called the Great Technological Stagnation and it will last about 80 years at least, and at most it will drag on for many thousands of years. The development of not only fundamental, but also small, far from fundamental technologies has stopped.
For at least 80 years, manufacturers will release the same smartphone, changing the body and name and presenting it as a kind of "breakthrough" that does not exist. In 2100, medicine will not move a single millimeter from the level of 2020. People will never fly to Mars, and scientific and technological research will stop due to lack of funding.
In the era of Stagnation, titans or geniuses are not needed, only consumers and income are needed. This will be the priority of all authorities in the world, and everyone who does not share this will be declared terrorists or something worse.
I think the word "almost" exaggerates the essence of the phenomenon too much.
In some areas, yes. For example, in the production of film, they have reached a certain limit of quality and yielded to digital devices.
But in the field of digital photo and video technology ... do the names HD, Full HD, 4K, 8K tell you something?
In the field of communications: someone else has 3g phones working normally, but 5g has already appeared. Despite the fact that the first cell phone began to be sold 37 years ago.
In the field of microelectronics, the 130 nm process technology was mastered in 2001, in 2021 the 3 nm process technology will be mastered.
Quadrocopters based on lead-acid batteries never took off, only thanks to lithium batteries these toys began to exist.
In the field of energy, look for "Closed Nuclear Fuel Cycle".
Why don't they patch the moon anymore? It's a pity of course, but the topic is not in demand. A man in the street does not want to buy himself lunar soil for seedlings o: (But the oyphone version N + 1 is yes.