Why you should upgrade from 6, 7 to 8 plus :
- better camera (OIS works pretty well)
- potrait mode is the best camera i've used
- wireless charging (really convenient)
- if you're gadget freak (like to have advance gadget almost every year)
- you don't wanna be left behind with your friend

Why you shouldn't upgrade
- if you're are a simple user, mails, casual usage with picture
- if you're hesitate ix vs 8 plus...go for ix, sell your 6 or 7 and start saving

- if you don't have money, 6 or 7 can last you , maybe another 1 or 2 more year(s)
well, im a gadget freak..

So I guess Ull be getting the ipx soon 😛 since it will be the latest and greatest in about a month