As happy as I am that more people will use Signal thanks to the desktop integration, I am pretty sure I won't use it myself.

I consider Signal the only "secure" public way to communicate with me, and it's because it's restricted to a native app running on an unjailbroken updated iOS device, which puts the cost of exploitation in the 1M$ band.

Pairing it with a laptop, in a browser context, kind of defeats that use case. And WhatsApp is a valid alternative for convenience.