This has bugged me a lot. Have I been gaslighted? Like, do sites lose my password? I can swear there have been like 10 occasions in the last 20 years where I had to reset my password where I am pretty sure I knew it.
(Not saying that simplifying several errors into one message is always bad. I think it's reasonable to just return a 500 without any info for everything that's caused by an unexpected exception on the backend.)
Most recent was setting a password for Rakuten Bank, saving it to my browser password manager, saving it to an offline password manager, and then two days later attempting to login and being told my password has too many characters. What.