Check what drop your get connecting the wifi modem directly to the router. There is usually a massive drop from wired to wifi.

What can the network cards support?

It’s half and half.

Because their core product - search, now sucks. Why? Page 1 is mostly ads. Compared to other search tools they are a much poorer user experience. Hell even Bing is better. They push their Bing chat based engine but you know what? It does a pretty good job without destroying what I came to do with the tool which is search for stuff.