While KiokuDB is a neat project, most of the time, in my case, I take advantage of my relational database, not every operation is simply store and fetch, but very often I see myself doing most of the business logic in terms of the relational model.

I'm not that all against KiokuDB, but it solves a different issue than DBIx::Class... In my case, I mostly can't allow myself using KiokuDB because I need my relational database to work as a relational database.