Very well put. I think we are conditioned to believe that updates are upgrades, but if a device is working properly, why "fix" it.
I bought the ZX-2 as a high-end portable DAP with a decent in-built DAC and amplifier, and it still performs well in that role. Incidently, I also have an RX-1, and worried about the lack of update, but why? It still has a lovely lens and takes great photos.
My point is, that paying for decent hardware isn't a mistake, and downloading bits of code won't change that.
Having said that, I admit that I sometimes use the ZX-2 for Spotify, and will be a bit annoyed if the ancient Android stops that from working at some point.