Separate Transport & DAC: Why not?

Hello: While searching related topics I've run across a growing number of posts that discourage the notion of a separate transport and dac. The most common reasons given has to do with "more": more wires, longer, more complex signal path, etc. What are your opinions, pro and con and the reasoning behind them? If, though, this topic has been already addressed in detail, perhaps someone has post a link to that thread? FWIW, I've come across a great Pass Labs D1 and I'm wondering whether I should find a nice transport or perhaps sell the D1 and buy a CD player. Thanks!