Plancast explored a different question from the location check-in: what are you going to do next? Instead of making yesterday’s activity the main story, it put upcoming plans in a social context. That makes the November 2010 headline about the future of checking in understandable as a piece of early social-app history.
A plan is more than a status update
Co-founder Mark Hendrickson’s 2012 retrospective discusses why the service struggled to reach beyond early adopters. Upcoming events have particular difficulties: people do not announce new plans continuously, and an event stops being useful once its time has passed. Browsing plans is also different from committing to attend them.
Those observations explain a familiar experience. An attractive event in a feed can inspire interest without answering whether a friend has a ticket, whether the venue has space or whether the proposed time still works. A visible expression of interest should not automatically be treated as an RSVP.
Separate discovery from coordination
For a real gathering, identify one place where the confirmed time, location and changes will live. Use the social post to help people discover it, then keep attendance decisions in a channel everyone involved can access. A small dinner and an open community event need different audiences and different expectations about who may join.
Why the history still matters
Plancast is useful as a case study even without installing its old app. It shows that adding a calendar date to a social feed does not finish the work of planning. Ask a modern event tool how it handles changed details, invitations and tentative responses. The best fit depends on the kind of event you are organizing; this retrospective does not claim that the historical service remains operational.