See, my feeling is, the flip phone will become completely obsolete at some point in time. The flip phone that I currently use was originally bought by my mother, who wanted just a *very* basic cellphone. The guy had to go in the back to look for it. He knew they had something, but it wasn't on display out on the floor. Once flip phones are phased out, what will take their place will probably be one or two basic smartphones.
I think everyone who currently has a flip phone should think about that, because if they upgrade to a new phone, they'll have to get a smartphone. Also, the software and parts for flip phones will be phased out so maintaining current software and repairing flip phones won't be possible after a while.
When I was at the Verizon Wireless store back on April 12th when my old flip phone stopped working, I noticed that they had NO flip phones on display. I didn't ask if they still sold any, because I want a smartphone and I had my mother's old phone I could activate and use for a while. Anyone who wants a flip phone may end up having to do some searching for it.