Re: Those thinking of moving to the Note 5...
To those saying "NO WAY!!!!" I'll ask you this: What are you going to go to as an alternative? Yes, you can stay on your Note 3/4 for longer, but after that?
The industry is starting to move away from both SD cards and easily swappable batteries. There are several reasons why both are going extinct, but the fact remains that OEMs are still dropping them. Phones that have either (nevermind both) will get fewer and far between.
The Note 5 will most likely have 128G internal options. Yes, not quite the same as having a potentially unlimited supply of sd cards to swap in and out, but with... maybe something in the range of 115G available. Need more, USB OTG is available if needed. As for the battery thing. Yes, the battery might be fixed, but from everything I've read, we should expect a sizable bump in the battery's size, and between improvements in hardware efficiency, that could lead to a considerable improvement in performance. If you still need more... the market is now filled with Quick Charge capable external battery packs...
I understand that these might not be an ideal solution for many of you. But you have two options here; rage against the dying of the light, or adapt your usage and move ahead.