TN should deliver notifications through Echo where available.
|Open||None||T125653 Create new types of notifications|
|Open||None||T48310 Deliver notification using Echo where available|
|Open||None||T181139 Investigate if it is possible to send translation notifications via Echo|
It seems that now that cross wiki notifications are available, using them would allow us to remove lot of code related to sending and different formats of delivery. That would leave the ui for signing up, delivering batches messages and the ui for sending messages.