that really depends. There are thousands of languages in the world in dozens of alphabets and I currently only have a hope of reading text in a latin alphabet. As such, even a rendering library that misrendered 99% of unicode but was CVE free would be a major win for me (and hundreds of millions of people)
it's hard to argue that "occasional accent rendering issue" is better than "occasional zero-click issue", but rewriting code of any actual complexity is hard in practice... and we are talking about only one library here, with thousands libraries and utils to go
