And what that means is that Signal will (presumably, because I'm probably not alone in my thinking) become a place where only "high value" communications happen. It will become the place where bad actors know that they can aim at any message and know that it will be worth spending the effort to decrypt. That is *terrible* for a system like Signal.
I understand why they would want to drop SMS. It feels like it's against the mission, it's engineering drain, etc. 3/?