Anything to do with the internet or even your home network, I call them network gremlins. When a network wire that is not reporting any errors can be replaced to fix packet loss or file sharing issues is wild to me.

A1: LG HDR WQHD A2: Yes A3: it uses two sources, not sure what you mean by 1 source unless you mean 1 source has two separate hdmi cables and if that’s the case then yes. The only other way is to use something like xrandr for linux

Love the ultra wide and would probably go for a newer variant. The only thing I don’t like is using kvm switches with these monitors because the systems go to sleep and the monitor turns off. This means that I’m always fussing about trying to wake the computer/kvm with multiple key presses until it wakes up. Not unique to ultra wide but more noticeable when using these screens usually mean you want more than one source.