As a standard for floating point representation and computation, IEEE 754 solved multiple long-standing serious problems better than anything that came before it. I don't think its sensible to judge it with a PL design lens like "principle of least astonishment"; certainly not as if IEEE754 is a peer to Rust or Python. Or, you could learn about the surprise, frustration, and expense involved in trying to write portable numeric code in the 1970s, prior to IEEE 754:

https://people.eecs.berkeley.edu/~wkahan/ieee754status/754st...