I would like to lose the Android phone soon. Signal will not work without an Android/iOS primary device.

But also… Signal requires a phone number for signup where a lot of countries require a passport to get a SIM (unique identifier that is easy to track you). The service is centralized so there is no sort of self-hosting option. There really aren’t alternative clients (not counting mere forks) you can rely on (this helps with the double ratchet encryption of clients with XMPP & Matrix losing keys) unless you go the gateway/bridge route—where the Electron desktop client is pure ass cheeks. Historically they have a big gap in commit history—we can assume there was some sort of CIA/FBI plant. They refuse to use a self-hostable MQTT/XMPP/UnifiedPush option for notifications meaning that the notification data timestamps always flow thru Google & Apple servers. And I am still salty the mobile clients removed SMS support which made it so easy to recommend to family in the first place.