Personally for me, it is as adamdea above mentioned, about ease of use overall. Sure, I want great sound too, and that should hopefully be expected for the most part. After messing around with iTunes libraries, laptops, Vortex Box, Pi's etc., and always playing around with this or that, trying to "fix" little bugs, I gave up. Yes, some of them had their merits, cheaper, etc., but I just got tired of the faff. To top it off, I am not all that computer savvy, so it was more work than pleasure.
I bought a Naim Uniti1 a bit over 10 years ago, because of the limited space I had for gear etc., and the thing just sounded great, and most of all, just worked day in, day out. Was it the best? No, but I could always depend on it, and the thing still works to this day and sounds great and still does service in a bedroom. Shame it cannot still be upgraded or I doubt that I would have moved on. But I replaced it with a Naim XS3 integrated and ND5XS2. A little bit of an uptick in sound quality, and cheaper for both of those than the Naim Uniti Star/Nova, and I didn't care for all the whiz-bang display-why when you are controlling it on an iPad, nor did I care about some fancy volume knob that I would never use. Again though, this setup just works, rarely ever any faff. Turn it on, listen to music, simples.
In my main system, I have a Lindemann Limetree Bridge2 connected to my LinnenberG DAC/pre, and again, just faff free, sounds great, and just works. It also opened my eyes a bit to just how much in this type of setup, the DAC itself seems to be the important bit, or more so for my ears than the streamer itself. But like anything, that all can be debated and talked to death. In the end, again, I just want something that works and that I do not have to tinker with. Again, simple. And no doubt, one can certainly do all that with much cheaper solutions, or other options, just depends on the perceived level of sound quality each individual might want to pursue.
The other thing is, in listening to the Naim streamers, I find the pricing to me, very appalling, and I would surely burn in Naim Hell for saying such a thing. I do not mean to bash Naim here, as I have typically had various Naim systems and Naim bits in my systems for over 30 years or so now. But I really struggled to hear any overall benefit between the ND5XS2 and the next step up Naim streamers, it made no sense. Live and learn, but again, everyone's mileage/beliefs/thought processes will vary. Sorry for the round about ramble, I've been awake far too long, and still have 2/3's of my day left to go....