I’ve always been against the built-in batteries. Thankfully, performance has finally caught up to a point where it doesn’t really matter as much, but I hate that I can’t carry extras around for unlimited capacity like I used to.
There are quick chargers you can carry. Of course the battery performance keeps getting too. I can play games on my phone all day and barely dip below 30% charge by the time I go to be.
Batteries can still fail for many reasons. Not having the ability to simply and quickly change out a battery is just stupid IMO.