Google makes a lot of money, and summarising stuff uses a surprisingly small amount of energy. You can do it trivially on-device on a laptop and on plenty of phones.
When it comes to LLMs, training the models is generally the thing that requires ridiculous amounts of energy.
This is dumb as fuck, though. I don't want Google's LLM to miss out critical details in my emails. That shit could be important. If people want this they should opt in.
So fucking dumb.
Everybody loved OnePlus's alert slider. Nobody wants fucking Bixby button mk2