The only people I answer the phone to are people I know who prefer that mode of communication. That list mostly consists of people older than me, with a few exceptions. For everyone else, whatever textual mode of communication is my preferred way to talk, since then I have a record to go back to, time to think to respond, no social pressure to talk right now, and no worries about actually being able to hear the person.
Spam calls probably accelerated this cultural phenomenon, but I've atleast been this way before spam calls were as bad as they are now.
It's always funny to me how not answering the phone is presented as rude by some people, when calling someone is essentially just shouting 'talk to me, now!' at them.
This[1] comment from a while back also resonates with me a lot.