absolutely agree with all of this.
On the one hand what I *really* want is a good, reliable transport that includes decent hardware with a reasonable variety of output options. In this sense the ET3 delivers. I think? and that's kinda the thing...we don't know how closely redbook specs have been followed. We don't know (or at least I don't) if, for example, the coax output terminal actually offers the 75 ohm resistance inherent to the coax digital spec. etc. It's well known that there are plenty of devices out there that have "balanced" inputs or outputs, but that the terminal is not connected to anything that's actually balanced in implementation - it's just a plug that accepts xlr. The point here is that at minimum, imo a CD transport should meet standard redbook and "transport" (ie output format) specs at a minimum. And the bigger point is that on some level (until someone tears one of these down to really look at the details) we simply trust that everything is in order, right?
As a follow on, if I see that this or that "extra feature" touted in the sales literature doesn't actually work in real life, this puts the whole device into question. This is just my natural predeliction - call me crazy but if the top level stuff that anyone can see and easily verify doesn't work, I have to wonder what else is not really working too. Further, when it comes to selecting a device I will naturally evaluate the "extras" that I don't need, to see if perhaps they would be enjoyable to have anyway. The "extra" DSD64 upsampling would have been a really nice feature to reality check whether it might be worthwhile to pay more for (let alone find) a custom cable to leverage the other i2s-only upsampling rates on offer, but alas, couldn't do that due to the feature not actually being implemented. Net takeaway is that the only "extra" (compared to other *transports*) I could verify was the upsampling to 192 pcm.
This sense of being let down by "false promises" was a significant part of the reason I sent mine back. The other reason was the lid, for which I could not find any love, though I genuinely looked for it. Glass lid + cat + occasionally clumsy human is not a great bet, long term - yes I considered this before ordering but wanted to see it first hand. The rattly sound/feeling of the plastic puck does not give an aura of durability. The occasional "open" warning that prevented play *even though* the lid visually appeared to be in place (I'm not stupid, I can actually see if the lid is in place or slightly askew) was not encouraging. And as reported by another user, I too got the occasional horrid rattling blender sounds on play, again, in spite of the lid being visually "in place". It was suggested he had a defective unit. Maybe I did too. But two lid related defects out of a very limited set of reviews is not a great average.
Regarding the idea that other devices have this "promise first, deliver (much) later" thing going on is wild, if it's true. I personally have never received a piece of audio equipment that failed to deliver the functionality outlined in its description, ever. Well unless it was just plain old broken. Which can happen, sure, but that's not really the same thing is it? I was still entertaining the option to keep the unit in spite of the myriad "yeah, no, not really..." revelations coming out here in discussions, but with the lid misbehavior on top of it? No.
Also I wasn't crazy about the presentation with some recordings. It tended to present vocals "pushed back" - I had an especially funny experience listening to "Sympathy for the Devil" - the bongos were blaring from one speaker, the "wooo wooo!"s blaring from the other, and poor Mick Jaggar was recessed a bit between yet "behind" them...audible but the vocals were well out of normal balance in a way I have never heard before. As much as I can appreciate a good laugh, I would like to listen to this album and have it sound fairly normal. Again maybe it was a defect but given all the talk about Shanling "house sound" I have to wonder. Really a transport should not introduce any "house sound" by my estimation, that's what a dac/amp are for.
None of this is to say that others don't or shouldn't enjoy this device. This is purely my experience and my analysis of the thing. It is not my bag, but might be yours, and if it is, that's fantastic! May you enjoy it for a long time.