Also from Germany here. Been using a Fritzbox 6660 cable after upgrading from the shitty ISP one. Not a single issue since. Moonlight is perfect. PS5 remoteplay via chiaki4deck is perfect. No artifacts and barely any noticeable delay at all. Actually insane how well it works. Bought mine for around 250€ a year ago. And the thing is my deck can only do WiFi 5 and it already is what I consider to be as perfect as it’s going to get.
Also from Germany here. Been using a Fritzbox 6660 cable after upgrading from the shitty ISP one. Not a single issue since. Moonlight is perfect. PS5 remoteplay via chiaki4deck is perfect. No artifacts and barely any noticeable delay at all. Actually insane how well it works. Bought mine for around 250€ a year ago. And the thing is my deck can only do WiFi 5 and it already is what I consider to be as perfect as it’s going to get.