I would like to trigger emails and alerts based on the status of a custom field. For example if a custom field is blank, send an alert to account email or third party provider. I would also like to be able to use it as a condition to prevent some messages being sent until the custom field has a value.
Another use case is when you use authenticator.com linked to OwnerRez and want to send a reminder if the user has not yet authenticated.
They need more triggers period.
Try to set a trigger that will be sent to a guest Sunday. The only way I could do it is to create 7 different Triggers based on their arrival date and conditions. That will only cover guests that stay for 1 week. That covers the vast majority of my needs but it was a bit much to do it that way.