I think that you can debug crash dump since windbg exists.
Nobody in their right mind uses windbg though. Visual Studio is really where it's at and the Express versions make it much more practical.
You can't even install Debugging Tools for Windows and Windbg standalone anymore.
Also I think that Postgres on Windows number of instalations is so tiny because people even today think that it is not so solid as unix version thats why you think that nobody use your code ;).
I disagree. Windows Pg users are often at bigger companies and don't talk about PostgreSQL as much. Often for fear of reprisals from other database vendors they have ongoing relationships with. At least that's been my experience and I'm sure EDB folks will concur.
Today if my memory serves me right this code can not deal with buffer overflow. Am i right?
Stack overflow?
No, it can't. The stack has to be somewhat sane.
May be we need to add this functionality instead of drop support of it entirely
Why? I've never seen any sign anybody has used it, ever.