I am talking about quality and reliability. I don't have a landline phone at home, because reliability and quality isn't as important for households. It is important for businesses and will remain in use there.
It is vital for the military and government and will never be abandoned.
Regardless of whatever uses it still has, it is simply an illegitimate practice for a pollster to only call landlines and pretend that it has conducted something worthy of being called a reputable poll. Unless the poll is specifically being done to demonstrate the dangers in landline-only polling (which even then of course should not be treated in averages like a standard poll), it should be covered with so much salt that you can't even see it anymore.
