It's the cult of the API. I have personal experience with this. Because of the lack of reliable iCal sync, a project I worked on had to spend over a week and a

It's the cult of the API. I have personal experience with this. Because of the lack of reliable iCal sync, a project I worked on had to spend over a week and a half of developer hours implementing, troubleshooting, and maintaining Google Calendar API integration for our users. It's the source of no shortage of pain for this app as it is a sideline feature, but has just enough demand that Google integration cannot be dropped. Google doesn't want to support iCal because they want to have everyone use their API.