My main problem is that they wouldn’t allow registration without having a smartphone first. At first I used signal-cli, which was inconvenient because there was no message history even. Now I use it in Waydroid, but why should one bother like that? And last time I tried it, the only way to bind a different device was by scanning a QR, which is not doable by Waydroid and iirc kinda hard in a VM.