I think the parent comment meant there isn't a way to make memory more efficient when it comes to app data. And code takes up so much less memory that x86 vs ARM code size isn't going to make a measurable difference.
In any case, 1.5TB is only going to help a few app niches. It is hard to even reliably predict which kinds. Even, say, editing 8K video could be well-enough accommodated with much less memory if file system bandwidth is high enough.
