The holy grail of assistive apps has long been a collaborative trip planning app.
But no one has ever successfully constructed such an app. Why?
Because there are too many bespoke combinations it would have to cover
Every airline / travel partner integrated.
Every chat app / ad hoc friend group communication style.
Integrating various notes and goals, from semi-structured requirements to notes on scraps of paper.
Every friend has to agree to use the same app.
That is, everyone has a slightly different workflow they use to collaboratively trip plan today.
If you make an app that perfectly solves a given user's workflow, the TAM is a single user: Far too small to justify building it.
To solve this problem, you'd need to atomize apps into smaller components that could be assembled into a just-in-time bespoke workflow.
A swarm of self-assembling situated software.