Re: R.I.P. to removable batteries, the V20 may be the last..
Why?
Why do you think that flagship phones shouldn't have removable batteries in them?
I don't understand this reasoning at all.
Shouldn't a flagship phone have all the amenities available for it?
Removable vs non-removable from a design and engineering standpoint, rather than a consumer preference of that one feature, creates a number of challenges and tradeoffs.
In favor of removable:
Easier for the user to replace
Removable door makes some other components easier to access
Etc, etc
In favor of sealed:
Better device designs are possible
Battery can be placed between the display and board, rather than having to reside on the outside of all components (this can be better for heat management and for making a thinner device, which people seem to like for ergonomics)
Better heat management improves battery life and improves the longevity of other components
Less buffer area surrounding the battery, so the battery can be larger or the device footprint can be smaller
Batteries can be irregular shapes (so far most OEMs are not doing this)
Easier to accomplish water resistance without any movable parts
Uni-body designs are possible, which means less structural compromise, better device durability
Etc, etc
Aside from that, battery life for the average user was solved in 2013. Most, if not all flagship devices last 24 hours or more with "normal" usage. Charging solutions such as QuickCharge have negated the need for long charging times and this is further mitigated by the readily available and very inexpensive portable charging solutions, etc. (and yes I realize that many of us are not average users)
It's very rare to hear about a use case where the user truly has no option other than a removable battery - because that use case would have to involve being away from all power outlets for at least a week - a use case that would also make a removable battery useless unless the user had a dozen or so spare batteries fully charged and being stored at a good temperature on their person.
If a person drives to work or sleeps in a building or has a job or is ever at a business or residence, charging is possible. And that doesn't take into account the ability to charge whenever you want with portable chargers.
The point of the last two paragraphs is that this is 100% a user preference thing for the consumer side, and that very few, if any people actually "need" a removable battery. But, that's what they want and it's ok to want whatever you want, which is why I said it's unfortunate to see the feature die out entirely, rather than just being available on limited devices. Obviously LG feels that they need to catch up to the competition, but it still sucks for those that wanted to remain in their current paradigm.