I know how Wi-Fi works, and how it sometimes doesn't, and this is why I'm using ethernet whenever possible. Cellular operates in a much more controlled environment with more stringent certification, it's much more reliable for me than anything 2.4 GHz, but it does still get frustrating at times. The lack of requirement of a low delay also helps both wifi and cellular I guess.

Exactly. If I had to score reliability, I would give 1 to WiFi, 10 to Bluetooth, one million to cellular and ten million to cable.

It's incredible how much better cellular works compared to other wireless "techno", but nothing replaces a cable.