Signal is working on a standalone version for Signal Desktop that does not require a mobile phone

PurpleDime:

I wonder if they’ll support VoIP numbers eventually?

I would be surprised if the did this anytime soon, considering the past statements made by Signal stating that the phone number requirement was essential to reducing spam on the platform.

Unlike a landline or “regular” smart/mobile phone number (sim/esim). There are numerous free and nearly free VoIP providers that Signal would potentially want to block to reduce spam even if they did begin accepting VoIP numbers in some limited capacity.