The real issue is somebody popularized this absolutely nonsensical idea that filesystems could be case-insensitive. They cannot. "A", "a" and "а" (Cyrillic) are

The real issue is somebody popularized this absolutely nonsensical idea that filesystems could be case-insensitive. They cannot. "A", "a" and "а" (Cyrillic) are different characters with different codepoints, whether you like it or not. Deal with it.