I have the 6+ going on about 3 years.  I take tons of pics, always gave.  I had my 4 for 6ish years. Started to run low on memory at the end, but it still worked.  Got my 6+ with WAY more memory as to not run into that issue again.  3 years in and it barely functions due to lack of memory from pics.  I have to delete apps I don't want to delete at times just to read an email in an emergency.  I've deleted so much, one time about 67 pics and a few vids, and I think two apps.  Should be good to go for awhile.  Nope.  It glitches the fuck out all the things me and I constantly give the fuck you go away to warnings assuming the are memory issues.  I'm over it.  I have a Samsung tablet, hate it.  I like how Apple works, but I'm sick of their bs.