Both of them are irreplaceable.
E: There’s a joke stating that the letter C can be replaced K and S (but “ch” can’t be replaced by “kh” or “sh”). In a similar fashion, em dashes (commonly used to add relevent information like parentheses or to introduce a definition) has some of its usage overlapped with parentheses and colons, but still has some unique usages that can’t be replaced.
“ch” could be replaced by “tsh”
S, the harder to write character should be the one to go, this also adds compatibility with Cyrillic.
Sh should then be the one replaced.
And my grandma is a human like Usain Bolt, both can run.
And if my grandma had wheels she’d be a bycicle!
Pretty niche reference that mate
Just like my refrigerator
YSK that em dash is also similar to the color green in Turkish.
ch can be replaced with x in my language
No
