Sure, but if the browser is the only thing that becomes more memory efficient that's still a substantial win.
Apple could lead here. They sell feels not specs so they could down OS and Browser RAM requirements and sell lower RAM entry models.
Of course seems like local AI is more or less a flop in the consumer market at least?
But still IMHO even for general use macos with 8GB is almost unusable unless you use it like an Ipad.