There's absolutely NO DOUBT that wired connections are more stable than Wifi especially in environments where there is substantial channel congestion. I've relied on a wired connection for years and have yet to have any problems with resolution, updates or other functions. If you have Ethernet ports near your Roku player or TV, I suggest you connect with them rather than WiFi. I use a power-line network which if unfamiliar, utilizes a home's electrical circuits to deliver data via special adapters. Hope that helps
Power User (film maker)
Mill Valley, CA
Jonathan
Roku Ultra 4800R; LG OLED55B7A, ONKYO TX-NR636, Panasonic Blu Ray, Definitive Studio Monitor 450 (L/R), Definitive LCR 2000 (center), Definitive 10" sub-woofer, Definitive surrounds. Motorola MB8600 modem. Asus RT-AX68U WiFi 6 router. Western Digital Power Line network adapters