I love old homes with original stuff, so I am partial. I would not want
to put new windows in one, but it isn't my problem ) If you are
relatively handy, you might be able to repair the bad parts if you can
have matching millwork done. Depending on the rest of the house,
keeping original windows might bring a higher price at sale. It's kind
of fun to mess around with old windows - worked on some at my daughter's
home, but didn't include such major work.

Do you have wood storms? What condition?

No, unfortunately the wood storms are gone. I currently have a bunch
of corroded, falling-apart aluminum ones -- another reason for the
upgrade.

I'd love to refurbish what I have, but just don't have the time (and
probably skills) at this point. If I do end up replacing them, I'll
store the originals in case someone later on decides they'd like to do
something with them.