I mean if you read any of the launch articles or people's experiences including my own you'd know it's incredibly hit or miss.

If anything you're wrong here. Neat tech, swing and miss product and quality wise imo.

I played Doom on my tv ( 10 years old with Chromecast ultra ) over wifi with a 50mb connection ( VDSL ) and was really impressed by the quality, responsiveness, how to setup things ect ... It's basically plug and play and it just works.

What do you define as unplayable? Reading your comments that you have fiber meaning low latency sounds very suspicious.

I would push a button and it was taking 1-2s to respond in Destiny 2 playing Stadia in chrome on linux. Playing on windows the input lag is less significant but enough where I can push a button and the action happens at basically a high ping couple hundred ms feeling.

Anything with an online component including things like ESO, an MMORPG, had enough input lag where I could not realistically enjoy playing.

It's a glorified VNC client with all its inherent drawbacks.

Actually you have to integrate Stadia in your engine so it's pretty far from a simple VNC, that's why it's better than other solutions.