I don't see much value in typografic quotation marks. My keyboardsettings don't include such by default, and since I'm not in the literature-buisiness, I don't need them on a daily basis to remember shortcuts.
Afaik, there are even a lot of conventions, i.E. („ and “), the same horizontally mirrored, and (>> and <<) and mirrored again, more common in the US, in France, in Germany.
If somebody edits my posts, I don't roll them back. I live since 25 years with email and classic "quotation" and didn't miss anything all the time.
If somebody is out for reputation -- that's fine. Btw.: I don't distinguish Viertelgeviertsstrich, Bindestrich, Trennstrich and other funky characters too -- the context almost always clarifies, how it is meant, doesn't it?
Automatic replacement should be avoided, at least in code blocks.