I still use a flip phone. I will join the 21st century when it dies, but it's been going strong since 2010.
For years my friends asked me, “When will you get with it old man? Get a cell phone.”
My response was always that I will get a cell phone when an unlimited talk phone costs less than my land line which was ~ $30/month.
Last April, it happened. I got an AT&T/Alcatel flip phone and service from Consumer Cellular who uses AT&T cell towers. Cost is less than $30/month including taxes, etc. I’m happy.