Absolutely, and I use Signal for a few things. It's not a perfect solution, but it's far better than most (looking at you, Facebook's WhatsApp, with your previous Pegasus attack vector).

Signal Just Works™️

Until you drop your phone in the swimming pool, and every message/photo you've ever received is just... gone. Forever.

Sorry but I don't buy any claim that Signal "just works". It's pretty clear they care about security more than anything else even when that means making decisions that are user hostile. And that's fine - if you feel like you need that level of security I'm glad Signal exists. But it doesn't really align with the general public and Signal is never going to be a mass market messaging service unless something changes (Signal or the general public).

What's weird to me is an app that excludes itself from phone backups considers SMS a valid form of authentication when a user links a device to a phone number - especially when you can necessarily link a device to a number that is already tied to someone else's device. Like how is that ever going to be secure? Spoiler: it's not. It'd make a lot more sense to me if users simply crated a username and shared it with other people instead of a phone number... and if they forget their password... come up with new username.