Let me preface that I'm not trolling you...asking a question with genuine interest in the response.
What about the possible HTC Nexus is more appealing than the S7 edge you're rocking now? I've seen you make the comment (I'm paraphrasing) that the S7e is near perfect, offering the first worry free experience on a smartphone. You seem to really prefer TW over stock, it has great battery life, the best display on a smartphone, a design that seems to truly appeal to you, fast AND wireless charging, arguably the best camera experience on a smartphone, expandable storage. I can almost guarantee any upcoming Nexus won't have many of these.
What's missing then?
No probs. Happy to answer. I'll just answer quickly so apologies if this is a bit messy...
I think I've mentioned a few times that the combination of HTC design and build, plus Android N now finally adding some of those useful features in TW that I've enjoyed can be a brilliant combination. Is it a guarantee buy and a guarantee S7E combo breaker? Well, no. Am I super excited about the potential of this? Absolutely. And, as I've said before, if Google/HTC somehow figure out a way to add wireless charging (the tech exists) or at the very least, waterproofing (cause I think this is more important), then that really eliminates some of the S7E main hardware advantages.
I'm sure you've read my posts saying that I think that currently the HTC 10 and S7/Edge are the top two best Android flagship options out there. They are perfect counter options to each other, each having a few specific and key advantages in hardware and software that the other doesn't have. Imagine if some of those advantages can come together in a single package, sold unlocked and at a reasonable price?
And I've also always said I wish Samsung figured out a way to get rid of the physical home button. I'm a fan of capacitive and/or on-screen buttons. I think I'm willing to adopt a back-sided fingerprint scanner if it means a truly clean front. I've also said bloatware is no fun so Android N has the potential to get me all or most of the TW features that I like, but minus the bloatware. And then updates from Google? No elaboration needed there.
Yes, I happen to love glass design phones, but I can still appreciate what HTC has done with the HTC 10. I'm looking forward to trying it out in person when they become available in the next few days/weeks. Maybe my opinion will change, but I've grown to really appreciate what HTC has done here. Improved Boomspeakers (or maybe front firing Boomspeakers will make a return to the Nexus device?) would be nice, too.
Of course, the HTC Nexus' camera will have to be up to par. Nexus 5X and 6P, and the HTC 10 itself, show great promise that both Google and HTC can figure out how to put out a camera that can match Samsung/Apple. If they fail here, the decision will be much harder as I do value the camera experience. And yes, you mention expandable storage. If this is missing AND Google refuses to offer larger/more storage options, then yes, that may be a dealbreaker, too.
So the point is... yes, the S7 Edge is by far the greatest and most worry-free smartphone I've owned, but it is not without areas it can improve on, and I've said as much in other threads. And the HTC Nexus is by no means a guarantee buy. It's more about the potential: An unlocked phone, free of carrier shenanigans, with direct updates from Google, reasonably priced; plus the hardware prowess of HTC and the new software features of Android N. It could be a killer phone.