people regularly use VPNs and today,in 2022, that is no longer a fringe action. NORMAL people now use VPNs to bypass geo restrictions.
signal to noise ratio of people using VPNs removes the linking user device to an account to a good extent.
now, in the existing model, whatever method you use, your number is STILL a PII, in whatsapp or signal or whatever.
>then so will anything else.
100% agree but you whatever counter measures you take, your number is still available in whatsapp/signal so there is NO way to prevent that. IF these two did not have the number, then that would indeed be better but not until then