6 methods to just keep up with work. I also have at least three ways to reach required documents and meeting notes. I really don't want to jump like a platformer character from point to point to be able to communicate and get things done.
In my personal life, I prefer "1 task, 1 application" model. Communications, one application. Personal information storage? Everything in one place, etc.
Application hopping has a very big mental overhead, and kills my flow. Many colleagues are in the same boat.
It's not Signal, it's any app, account, for any reason.