The best practices I've read mostly say that inheritance should be limited to one non-interface parent. I.E. obly one parent with an invariant. For everything e

The best practices I've read mostly say that inheritance should be limited to one non-interface parent. I.E. obly one parent with an invariant. For everything else composition. That mostly lines up with my experience, but I mostly deal with problem spaces that aren't terribly OO like DSP.