To me, it just doesn't feel like the right approach to the product, replicating the original, warts and all. You can easily pick up the original or Nait II for less than the reduced price, and it's all standard parts, so cals can easily be replaced to give it a refresh. With Naim's modern approach to hi-fi after the take over of Focal, they should've modernised it. It would've been very easy to add a remote control, which I think is unforgivable nowadays unless something is being used as a desktop/PC system. And even if they didn't want to add any digital inputs, they could've modernised the available inputs
But they did change one thing - the sound. Tonally it sounds more like other amps now, whereas the original had quite a lean, detailed sound (which I quite liked at the time), probably more like typical Class D amps. Why change that aspect when everything else is nigh on identical?
I don't think anyone else's retro product has bombed in such a way as the Nait has. It'll be interesting to find out the exact reasons why. Maybe any future anniversary products will be more carefully conceived and priced.