The sentence you quote is near to the words: “[The C++ standardization committee] WG21 has recently adapted the changes promoted in their document p12363. Gene

The sentence you quote is near to the words: “[The C++ standardization committee] WG21 has recently adapted the changes promoted in their document p12363. Generally, C++ goes much beyond what is presented here:” I would be extremely surprised if the proposal to make signed arithmetic overflow defined behavior in C made it into C23. The window is narrowing and this would be a very big change to the language. Making it official that 2's complement is the only representation for signed integers is already a large change. Later in the decade, maybe.