Sorry, but I have to reiterate what Mimesis says: 818v3/ID41 + Roon IS the best streaming solution for the 818. If you own the v3, it is almost criminal not to use this, it’s sublime.

The price of the new Roon Nucleus One (€599) plus a lifetime Roon subscription ($830) is likely still half the price of a used G2.

You would need to pay for a streaming service subscription either way, unless you are only streaming files on your local network (at which Roon excels).

Roon also has a multitude of other benefits, it really is very, very good indeed.

Why not just install Roon trial on a PC connected to your network and get a Tidal trial and try it out?

HC: 861v4/ID40/LPS, DSP5000, DSP5000VC, DSP3100, SW1600, HD621, Oppo BDP-105, Sony VPL-HW55ES
2-Channel: Oppo BDP-105, TEAC VRDS-7/Trichord Clock 3/PSU, 551, Quad 303, Harbeth Compact 7ES-3, Kimber cables, Russ Andrews mains and supports.
Previous Meridian: 5000C, 5200SL, 7200.2, 6000, 562V.2, 568.2mm, 800v4, 808.2i, 818v2/v3, 861v8, 502