I salute your level of abstraction but I personally draw my line in the sand a bit higher. A library project for the data access layer with a stable app facing

I salute your level of abstraction but I personally draw my line in the sand a bit higher. A library project for the data access layer with a stable app facing code API gives me the best bang for my buck in terms of flexibility and abstraction. That said, its easy for me to push out new code versions. I realize it doesn't work for everyone.