I have an S5. I can understand the move back to USB2 in S6 and above, and I don't know if USB3 is the cause, but my S5 battery goes from empty to full in a good short space of time, so I'm not missing out that much on the super charging goodness. Battery life is still good too. I'm also lucky to be in a country where Samsung have 2 free screen repairs over 2 years.
Hopefully I'll be able to wait for the S8 or 9. I'm impressed with the S7 on paper, and I'm glad they brought back the things that made me dislike the S6. Now for hoping for better Android upgrades from Samsung :)
Of course it would be nice if Samsung at least cared to provide security updates.
I felt the same way when I had to replace a phone battery...which then made me wonder what the point of having a replaceable battery is when you worry that a replacement battery might explode. So my next phone, HTC One, did not have a replaceable battery and I did not miss it. Replacements are too hard to find and besides it's easier to just plug in an external battery anyway.
I see why Samsung went with the non-removable battery on the new phones.
I suppose I could have the foresight to buy two batteries when I get a new phone, although I've never done that and I'd have to work out how to store the second battery so it wouldn't go dead or get lost, and it increases the initial cost of the phone even further.
My friends make fun of me for how 'small' it is, but I look at them put their giant phablets to their ear and it just looks ridiculous. Wasn't the big thing making things more compact, now we're going back to giant phones again?