A lot of these techniques are fragile, and complicate lots of other things. It is very useful if the same code compiles to the same binary if no changes occurr

A lot of these techniques are fragile, and complicate lots of other things. It is very useful if the same code compiles to the same binary if no changes occurred. But having the date and time or a version control comment change a binary may lead to unnecessary churn with dependencies, packages, and integrity checks.