Yep, I viewed/read alot of good after-launch commentaries about the battery life being actual very good to excellent in practice on the G7, everywhere from post-launch reviews to XDA posts to Youtube, so I'm not too worried in that department.
Still, it was just ultra-convenient to carry along an extra fully-charged battery - especially as quick-and-easy as the G5 made it to do so with the bottom latched holder for them. Its not even so much in day-to-day usage as on trips where it matters. Between work and home I always have an easy way to plug in/top of anyway, but on trips/vacation is where that really mattered. We do have 2 nice external QC batteries now, but its just easier to carry a thin little battery around than those of course. The G5 was the last bastion of removable battery phones - the only real main reason I finally decided to upgrade is just to stay more current from a security/patching perspective really.