curly single quote vs the apostrophe

curly single quote or the apostrophe

Which is more common, the curly single quote or the apostrophe, such as used in it is abbreviation?

my syntactic obsession.

the problem with the curly single quote

’ (U+2019: RIGHT SINGLE QUOTATION MARK)

is that it is a matching pair used in Brit english for ‘quotation’. therefore if you use it as apostrophe, it creates mismatched character pairs.

so, in my writings, i always use

' (U+27: APOSTROPHE)

for apostrophe, e.g. it's