Performance of different streaming solutions

[Snoopy8]

My problem is the fact that UPnP sounds better to me when used with local music collection.

I agree.  I trialed Roon a few years ago, but SQ was not as good as UPnP (using MinimServer and BubbleUPnP app).  I have personally heard, and confirmed with a number of people, that a native music player app is better than Roon. However, Roon is attractive for many people.

today was not a satisfactory testing day.
Within a couple of hours of use, Roon decided to stop 3 times and "popped" at least twice...

Roon can be CPU intensive and I suspect your box could not keep up.
---

I like BluOS and I can understand why you are reluctant to move away from it.  However, the Node is only an entry streamer and streamers do affect the SQ.  Premium streamers have better power supplies, better clocks and a better chassis. But like everything Hifi, there will be people who will dispute this.

Also, you can improve the Ethernet performance with better switches and cables, but this is even more controversial.

At the end of the day, you have to decide what works for you...