Month ago I've had stable 45-50ms latency (according to Stadia Enhancer extension onscreen overlay) in all games via 5ghz WiFi and Chrome on my laptop. Today I checked out again and right now I have around 70-75ms of latency. What happend? Data center maintenance day or what???
There are probably a lot of hops between you and the Stadia datacenter and it's impossible to guarantee the entire path will always have the same latency, or that the path itself even remains the same. Since you're on wifi, that's a whole other can of worms in terms of your local network latency since you can't control all sources of noise that might cause the need for extra packet retransmission (and extra latency) at various times.
There are probably a lot of hops between you and the Stadia datacenter and it's impossible to guarantee the entire path will always have the same latency, or that the path itself even remains the same. Since you're on wifi, that's a whole other can of worms in terms of your local network latency since you can't control all sources of noise that might cause the need for extra packet retransmission (and extra latency) at various times.
Yeah, right now I have 55-60 ms of latency in conditions described earlier. I tried to wire my laptop to my router and latency lowered up to 5ms. It helps a little but in my case (I have 30 Mbps ADSL connection with no fiber available) this is not a universal solution to high latency.
Google is still in the 'blame the ISP and client' phase of denying they have a widespread problem.
Stadia has been unplayable for 5 days for me because my 400 Mbps connection 'isn't good enough to play'.
It is not only about the bandwith but maybe even more about the latency and overall network quality.
You can be able to download at amazing speeds but still hit a wall on latency.
I am having some issues with my ISP in the evening as the whole neighborhood get's behind their screens.
Still having 250 Mbps but the latency is all over the place, at the afternoon there are no issues...