So bitcoin has moved to proof of stake?

Bitcoin doesn’t even have smart contracts. How is it relevant?

Is it not a blockchain technology?

It is, however, not the blockchain technology.

https://en.wikipedia.org/wiki/Association_fallacy

And yet it causes more climate change than Scotland.

The entire thread is about Ethereum...

I doubt it, they just hid the dirty little secret that everyone putting up the stake will now mine it on another chain