1. “Password‑length exposure is essentially harmless”
“Password length are exposed in virtually all scenarios except the Unix Terminal – and have caused 0 issues in practice.” – tsimonescu
2. The real trade‑off is convenience vs. (minimal) risk
“The real question isn’t whether it has any security benefit; it’s more is the convenience greater than the risk it introduces.” – hnlmorg 3. Knowing the length does aid attackers
“Knowing password length makes it easier to crack an insecure password.” – SAI_Peregrinus
4. Tradition and implementation complexity drive the debate
“The first is like 3 lines of code, to get the attrs, disable the echo flag then set the attrs again. The second is.. I don’t know probably about twenty lines of code to handle the primitive line editing yourself and also asterisk printing. In my view, this is enough of a difference to motivate a conclusion that the first is good enough.” – mikkupikku