To address your second point “not voting for Harris is a vote for Trump”; why isn’t the opposite true? “Not voting for Trump is a vote for Harris”, follows the same logic, so refusing to vote or voting independent should be net neutral, no?
You're missing some context - “not voting [instead of] for Harris is a vote for Trump”. If the dilemma is between not voting and voting Harris, choosing not to vote subtracts a vote from Harris.
Of course Harris got a boost in donations after she became the candidate - she appealed the the people who thought Biden was too conservative. That doesn't mean conservative democrats are an insignificant demographic, they simply already donated earlier. The move towards the center is meant to not drive them away into not voting [instead of voting for Harris]. Obviously there will be some progressives and some conservatives who will decide to not vote [instead of voting for Harris], the goal is to move to the point where these margins from both sides will be minimal.
Huh?
The smartphone improvements hit a rubber wall a few years ago (disregarding folding screens, that compose a small market share, improvement rate slowed down drastically), and the industry is doing fine. It's not growing like it use to, but that just means people are keeping their smartphones for longer periods of time, not that people stopped using them.
Even if AI were to completely freeze right now, people will continue using it.
Why are people reacting like AI is going to get dropped?