Anh
Naim ghetto blaster
Years ago you could add a Hicap to your system and it seemed like a good upgrade. I did this and heard improvements. But when I look at the current range and do wonder? The ndx is a prime example, only at its best with two massive external power supplies. The whole package costs thousands. This is clearly a marketing decision, any decent designer could make this work in one box.
There is also the factor of demographics.
If you can afford multi-box Naim rig, you're likely to have a larger than average property to fill all that space up with - space is not problem that high-end vendors have to address.