Maybe consent is not an appropriate term. Perhaps an acknowledgement and a way to say "I don't want this" would be a more suitable approach. I feel like a flag to turn off LLMs is useful. Firefox added something like this in a recent release. I don't know how much they're downloading or how much they run it, nor would I be a good judge if it's necessary or not, but I don't want that functionality in my browser so turned it off.

Extra power and ram usage without your permission, for example.

Sounds like the words of someone that doesn't pay for their data use.

Silicon Valley is not the world.