I’m a big fan of lftr reactors but its not as simple as the author asserts. There’s a bunch of companies working on the lftr design. They have been doing so for years. There are no prototype reactors as yet except maybe in China. That’s not to say prototypes have not been done in the USA. Alvin Weinberg —the inventor of these kinds of reactors— had one prototype working in the late 1960.
Yep... The Red Chinese have nothing holding them back from development in any direction. They are also certainly working on development of, if not already operating, TWRs.
From the linked article: "In September 2015 TerraPower and China National Nuclear Corporation (CNNC) signed a memorandum of understanding to jointly develop a TWR. TerraPower planned to build a 600 MWe demonstration Plant, the TWR-P, by 2018–2022 followed by larger commercial plants of 1150 MWe in the late 2020s.[15] However, in January 2019 it was announced that the project had been abandoned due to technology transfer limitations placed by the Trump administration."