OK let me explain....
Is it controversial because it's not obvious at first glance what it is.
It is a.... transport. A hard disk transport. Similar to a CD transport, except it reads data from a hard drive. A state of the art audiophile hard disk transport @ $2000. Forget about the remotes, network and the infinite ways you could organize and display the playlists. That's just an user interface. The essence is that it is a transport.
Now to compound the
, there are two additional issues.
First, it doesn't have a DAC. If Bryston came up with the BCD-1 as a transport only too, it would had been controversial for the same reason ("mhhh yet another transport, digital is digital, the bits on the cable are the same so why do I need a $2000 one, my $500 CD player has digital output and will do the job as well").
Second, the hi-rez downloads are not a well established "media". So people don't think yet about them very seriously. They mostly think "CD rips" for now, which makes the BDP controversial again. ("why not just listen to the CDs directly").