> <snip> the wild spores may make
> great wine, but may just as often not make good wine.

Saying it that way seems to imply that wild spores will
make great wine and a packet of yeast will make somewhat
less great wine. In fact most of the purchased yeasts are
cultured exactly because they create great wine. IMO, you
probably have a chance at creating as great wine with
wild spores as you do with cultured yeast but doubtfully
better and almost assuredly worse. Unless the area the
grapes came from is "ripe" with a great natural yeast and
then it's still a crap shoot.

Don