Yes! "It is better to have 100 functions operate on one data structure than 10 functions on 10 data structures."
I don't care if it's literally Emacs, but I want all my data in one place. Half my programming career was spent taking one dumb format and converting it into another dumb format because the systems were incompatible, and for no good reason.
People complain about needing "dongles" (i.e., adapters) with Apple's new laptops, but there's a simple and obvious fix (buy one), and we can see the endgame (everything USB-C) where even that won't be required.
Programmers spend all day building custom software "dongles", with no end in sight. Why aren't they angry about that?
Yes, the answer is yes it should do it if people want it and are willing to work on it. Let people decide what they want to build and use within the software they use.
Of course “emasc can do anything” is ages old argument, but should it?