Of course, you won't see it until the makers get their shit together. Why else would they glue things such that one can't replace even some cheap component and instead having to buy a new phone?

For now the ruse brings the loot, as with everything, it goes in waves, this shall pass and we shall eventually get to a stage where we will find balance in this matter.

Currently, the battery is what pretty much limits the device profile. All the miniaturization achieved on the components should actually aid in nice, modular design that allows replacement of particular faulty part (if you can deglue the whole thing first).