The only case where I see a reasonable toast case is for asyncronous events that are a response to a recently applied change.
Let's say the user wants to import some data source, and it says something like "Importing...". Sure, you can leave a notification in the menu, but if he did that import 1 minute ago, probably he wants to see some hint immediately. It's the same with the floating notifications in the phone.
Let's say the user wants to import some data source, and it says something like "Importing...". Sure, you can leave a notification in the menu, but if he did that import 1 minute ago, probably he wants to see some hint immediately. It's the same with the floating notifications in the phone.