Can a Bluesound Node 2i power supply really be upgraded?

No condescension intended. Started with sorry.
Substance?? Really!
Glad that your are happy. I said stuck and you like it. What's the big deal.

Just to put in my 2 cents worth, I got the PD Creative update from Poland and installed it in a node2.  It then requires an out board linear power supply which I didn’t know when I did it.. however  I got one from Amazon and installed a synergistic black fuse, and used a thick shielded 2.5mm cable to hook the power supply to the node. Let me tell you this is no joke! It was like a new component. Crystal clear, excellent sound stage, and “dead” I mean “dead quiet”.I can’t believe this made such a huge difference. Highly recommended. 

@lanrmack - you could try putting good cables on your Node 2i

Granted, this IS NOT a cheap solution, but it migrates nicely to the next streaming device you buy and you DO NOT have to dive into the guts of your NODE 2i to apply it.

I have the Node 2i and have built these power and interconnect cables, which provides exceptional results - very noticeable.

My Audio Alchemy (image99.net)

The improvements exceeded my expectations and has continued to improve as I have updated the power and interconnect cables with different wires/insulations

You may like to read this thread for the opinions of others that use these cables in preference to some very established brands...
https://forum.audiogon.com/discussions/duelund-conversion-to-diy-helix-geometry-cabling.

I also have these cables on the PowerNode 2 and the Pulse Mini and the improvements were exceptional

Just another approach to your problem

Regards - Steve

i haven’t bit the bullet and gone w roon yet but of all the streaming softwares i have tried (and have tried about a half dozen) i like blu os the best... it is not perfect but it is very good, though you need to do updates reasonably often... it is a quick and painless procedure

on a separate note, i would imagine @dinov got the improvement on the node with the polish ps mod + lps primarily in the dac section... 

Are there better streamers than the BS Node? Certainly. However I find for value,I’m all in with them. I actually run 3 Nodes. A N1,2,and 2i. I find my systems very pleasing to my ears. But certainly not the final word. I’ve upgraded cables on the 2,and 2i,and also run these through external DACs. The N1 I use in a little system in my breezeway. I’m using the internal DAC on that one. It is adequate.

I would love to hear a BS product with an upgraded power supply. I’m not an electronic diy kind of guy,and I would be afraid of blowing something up. So I stick with what I know,switching cables. Remember what Clint Eastwood said; “ Every man must know his limitations.”