It seems the people making the decisions about what accessories to include in high-end audio interfaces never suffered a life-changing moment of Christmas disappointment. We are talking about a 7 year old opening a Christmas gift to find no batteries to use it and the shops closed.
For most kids this was when the seed was planted for them to stop believing in Santa Claus, because only a mean spirited, tight-ass would do something so low to a kid.
We've just been discussing in the PTE office why it seems that some manufacturers of high-end (sometimes several thousand dollar) interfaces include everything but the one thing you need to use it, the Thunderbolt cable.
Now we know the arguments cited such as - it's hard to know the length needed, if that's a valid argument then why do USB cables come with $200 USB audio interfaces? The other argument made to us when we ask them is more genuine, it would add $30 to the price of an interface. OK we understand that, but if it was a $200 interface then that would make some sense, but on a $2000 interface it doesn't.
So here's a plea to all those selling high-end Thunderbolt audio interfaces, include a Thunderbolt cable and stop being so eager to save a few dollars. Don't suffer the same fate as Santa.