Thanks for sharing what you know. I'm not sure how I feel about vinegar flies, but I appreciate your willingness to discuss it.
Also, kudos to you for making peach wine! I didn't know that was a thing. My grandmother made muscadine and blackberry wine, but I guess we were too far north for peach wine to be a thing. I love learning new things!
You can make wine from any fruit as it is the fermentation process that is essentiel. My mum used to make bramble berry wine as the fruit was plentiful back in the old days.
Some people make elderflower wine and apple wine which is quite popular in the UK.