Since February, I have had problems with the Wi-Fi in the domestic RCC at SFO and both DEN RCCs, every time. The tragedy of the commons has struck again; it struck before when Wi-Fi became free for RCC members several years back.
In addition, the three aforementioned RCCs are much more crowded. I've never had to spend as much time to find an area to work and plug in as I have since February.
Relief is coming. Sky high fuel prices will drive up fares and drive down passenger traffic.