APFS still defaults to case-preserving:
[nathell@macmini /tmp]$ echo first > A
[nathell@macmini /tmp]$ echo second > a
[nathell@macmini /tmp]$ cat A
second
Re:Safari tries to fill username
by emodendroket on Sunday May 30, 2021 @04:43PM
(#27336549)
That's how Windows will behave but not actually how the underlying filesystem does.
So, it will show you what was entered and make you think it’s case-sensitive, but then when you go to do the comparison, it actually ignores case.
The stupid thing is that MacOS was also case-preserving but not case-sensitive for a long time.