I certainly understand the value of replaceable batteries. OTOH, I'm concerned about what this will mean for how many common upper end phones are IP67 submersion rated. I don't want that to go back to being a feature only of clunky super expensive phones, and I would rather have IP67 over a replaceable battery.
Now, if I'm lucky, they will mandate both a replaceable battery and that the phones be ip55 or better, after battery replacement.