Handwritten letters at scale
A twitter thread showing how a business started creating handwritten notes to customers using a plotter, and how they scaled up and further automated the process.
It would be cool to create something like this for western Europe. Handwrytten.com seems to be the main commercial implementation of this idea in NA. Competitors.
I still think it would be fun to make a simple photo printing service. Share a photo in a WhatsApp message and its printed and delivered.