The statement that "the universe has made almost all the stars it will ever make" is not entirely accurate based on our current understanding of the universe.
Stars are formed through the process of stellar evolution, primarily from the gravitational collapse of large clouds of gas and dust called molecular clouds. These clouds are scattered throughout galaxies, and as long as there are molecular clouds present, new stars can continue to form.
While it is true that a significant portion of the available gas in the universe has already been converted into stars, there are still ongoing star formation processes occurring. In galaxies, there are regions where new stars are actively being born, such as in stellar nurseries and regions of active star formation.
Additionally, the universe is a vast and evolving entity, with new galaxies forming and others merging over immense timescales. These cosmic processes can also lead to the formation of new stars in different regions.
However, it is worth noting that the rate of star formation in the universe has decreased over time. The peak of star formation activity occurred several billion years ago, and the overall star formation rate has gradually declined since then. Nevertheless, new stars are still forming, albeit at a slower rate compared to earlier cosmic epochs.
In summary, while the universe has produced a substantial number of stars, it is not accurate to say that it has made almost all the stars it will ever make. Star formation is an ongoing process, and as long as there are molecular clouds and suitable conditions, new stars can continue to be born.