The only thing that can make replaceable batteries a thing of the past is a concept called brand loyalty being universally embraced.
I don’t think that is possible.
Believe me, I treasure removable battery feature, but who’s left building high end phones with replaceable batteries besides LG? Huawei? Lol.
Currently several less than flagship models from various manufacturers still feature removable, but it’s a dying breed. Manufacturers have stubbornly followed Apple in pursuit of the thinnest phone competition.