Existing iPhone 6 owner here, strongly considering upgrading to either a 6s or a 6s+. Backstory: Been an entirely satisfied iPhone user since the 3G. Before that I was an extremely heavy iPod user, being utterly music obsessed so with each iPhone I've gone for the highest capacity available each time. 3G 16GB, 4 32GB, 5 64GB, 6 128GB. Upgraded every other year figuring that buying on launch day with Applecare would give me a 24 month supported life, with each upgrade being a worthwhile, significant update. The natural update to my 128GB iPhone 6 would be the likely 7, especially with the rumoured 256GB model. However the recurring rumours of Apple dropping the 3.5mm headphone jack is giving me serious concern. I own and get daily use out of my Bose Qc25i and Qc20i headphones, cans I use with my MBP & Surface Pro 3 as well. The idea of having to rebuy lightning cabled headphones having spend nearly £600 on my perfectly good existing headphones does not appeal. Nor does having to carry around a lightning > 3.5mm adapter. Of course everything regarding the 7 is all rumour with nothing that can be be known for certain before the 7 launch keynote. So why the upgrade consideration? Music aside, I was concerned moving from the 5 to the 6 on account of the 'huge' screen size. Turns out I needn't have worried as the 6 has been wonderful from a screen size perspective. The Kindle app has been terrific, webpages have been so much more legible and single handed use hasn't been the issue I thought it might have been.Likewise Touch ID wasn't something I initially thought I would make heavy use of. Turns out to the opposite: as well as easy unlocking of the phone, I've made regular use of it with the Amazon apps amongst others. Wouldn't be without it now. So a 6s would be good, and a 6s+ screen would probably be even better. So it comes down to the two factors mentioned in the title: Has 3D Touch proven to be a worthwhile feature now that time has passed and more third party apps are supporting it? Has it improved the navigability of the phone, Safari and other first & third party apps? Likewise has the 2GB RAM vs the 1GB of the 6 made a meaningful day to day improvement? I appreciate the releasing of RAM pressure on a technical level but has it translated into an appreciable real world benefit?