If you could bring back any discontinued or obsolete product, what would it be?

If you could bring back any discontinued or obsolete product, what would it be and how would you modernize it? Whether it's a nostalgic favorite or an innovation ahead of its time, what would it be, and how would you modernize and reinvent it for today's world? Share your ideas for a revival that combines the charm of the past with the functionality and style of the present.