I have a Maxx HD, (yes having a battery that size essentially invalidates any argument at this point, haha!), but before that, I owned a Droid 4 with a non removable battery.
With the direction that battery tech is going, the argument for
NEEDING a removable one is slowly diminishing. Think about it, of all the flagship phones (RAZR HD, S3, DNA/One/ and Nexus 4), only one has a removable battery. Yes, that one has a huge market share, but its not because of the battery.
As long as you provide ample juice for a day, there really is no need to be able to remove it, IMHO. And this is becoming easier to do with the way software and processing is advancing (read: lighter UIs and less energy dependent processors). Now, there will
ALWAYS be that group of people that either need longer than a day of charge (campers/outdoors-overnighters) or just beat down on a phone with streaming movies and data intensive apps. To them I say, 1. Buy a portable battery like
this for long trips, and 2. If you're in a place where you can settle and beat on your battery (aka within a wi-fi network), then you are close enough to an outlet should you need it.