Thanks, it's indeed point worth taken. I think that the fact that you always have just one transport doesn't mean you shouldn't separate the concerns for it.

Repository for example - I like repository (or DAU) not because I can change DB (to be honest we rarely change DBs...). It helps in the maintainability of the changes. Your application will grow, change and adapt, and when you have a change related to the data-layer, you want to see changes only in the repo, when you have changes related to the delivery, you want to see these changes only in the transport...