Re: A thought... (a solution?)
For those who don't mind spending some money on solving the problem, get a trueCall. Regular and known callers don't get intercepted once you set it up but spam calls drop to very near zero. Those few that do stick with it long enough to cause your phone to ring, can then be zapped by a key press without any need to speak to them. The peace is bliss! As is knowing once again that the ringing phone is a genuine caller.
It has been interesting to hear many of the new callers (not as yet on the Allow list) asking about the device as they too are fed up with spam calls.