I bought my Node 2 6 years ago and I have been upgrading it and the power supply over the years.
Prior to owning the Node 2 I had a Sonos system and I had that running into a Rega Dac-R, so when I bought my Node 2 I ran it straight into the Rega.
After inheriting a Leema Acoustics Antila IIS Eco from my late uncle I traded it in for a Primare DAC30 and ran the Node 2 into that. That was an improvement over the Rega.
In the first lockdown I kept reading about these guys on Hifi Wigwam who were upgrading the power supply on the Node 2i, so I thought that I would go for it as well. I bought one of the of Polish power interfaces and an Allo Shanti power supply. I was very pleased with the results. Less background noise and better separation of the instruments.
This Christmas I managed to pick an SBooster power supply off Ebay and an Atlas Opal digital interconnect. I plugged them into my main system and again I got another boost in performance. My main system has never sounded so good
The performance of the Node 2 (and other variants) is scalable. Yes, you could buy a more expensive streamer in the first place, but I could not afford to do that.
My upgrade steps have not cost me that much and I have received a lot of enjoyment out of them. I do admit that I was lucky to obtain the Primare DAC30 back at the beginning of my upgrade journey though.
I also like the BluOS app and after using it for so long I am quite used to it.
The only niggle I have had with it happened just over 5 years ago. For some reason the app would regularly not see the player when I opened it up. It would work okay if I turned the Node on and off, but that was a bit of a faff and detracted from the experience a lot. I raised it with the Bluesound technical guys and whilst they were helpful they could not offer a solution.
A couple of months later, after a software update, the problem was gone and it has been rock solid since (touch wood!)