On its 10th anniversary, Signal’s president wants to remind you that the world’s most secure communications platform is a nonprofit. It’s free. It doesn’t track you or serve you ads. It pays its engineers very well. And it’s a go-to app for hundreds of millions of people.
As a happy user of Signal (no bugs or incidents from my viewpoint), I regardless chime in to say a word for decentralization. :)
Signal is centralized:
there is a single Signal implementation, with a single developing entity
you have to install its mobile version before you may run the desktop version
There exist protocols like Tox which go a step beyond Signal and offer more freedom -> have multiple clients from diverse makers (some of them unstable), don't have centralized registration, and don't rely on servers to distribute messages - only to distribute contact information.
In the grand comparison table of protocols (not clients), Tox is among the few lines that's all green (Signal has one red square).