Well voicemail and caller ID, I usually send Email since it is free and texting costs me money.
However, lots of people are hard wired to answer a ringing phone. So if you call them they feel obligated to pick up. a text can sit there until they are ready for it.
In my line of work, you got to answer the phone. Found most younger people in my office simply ignore the phone unless it is theirs. That is a no no in either retail or logistics.
If someone is calling, we got a problem that needs solving RIGHT NOW. Really get fed up having to answer everyone's phones. They don't seem to realize, they can ignore the phone, but they are still going to have to deal with the problem. All the person answering the phone for them is going to do is get pissed off, then forward it to them. They might as well answer it 1st and save the butt chewing they are going to get
Nowadays young people will look at a text message rather than answer a telephone sad but true.