This seems like a good feature.

Though, the main thing I want from Signal is back-sync (from a phone to a computer) when pairing a new device… The lack of the ability to do that is effectively a deal breaker for me. I want my entire chat history (or at least the last 90 days or so) available on my computer so I can search it/see recent context even if it’s a fresh install/new device/there’s a bug resulting in a resync being required/etc.