Signal operates on the idea that anything sent through chat is ephemeral and not worth keeping, which just doesn’t work in practice in my experience.

When you’re knee deep in conversation with someone you’re probably not going to say, “oh hey we should switch to email so we can keep a record of this”. It might not even occur to you that the conversation could ever be of value.

There’s been several occasions when my life has been made much more easy for having been able to dig up some old message in iMessage, Telegram, etc from as far back as multiple years ago sometimes because the way things played out the pertinent info didn’t exist anywhere else simply because nobody involved could’ve ever guessed it had any importance.