what are some problems you've run into with filenames in the terminal?

so far I have:

- operating on filenames that start with `-` is hard
- spaces in filenames
- accidentally creating files named with special shell characters (~, *, ?)
- maybe non-ASCII / emoji filenames? (would love specific examples)
- (on Mac OS) filenames with uppercase letters can get weird sometimes (would love specific examples!)

what am I missing? (only problems related to filenames please)