AI data centers are eating like 80% of memory.
Making user space applications more memory efficient is not even going to be a rounding error on memory demand.
I am with you that it needs to happen, but it's not going to solve a memory shortage.
That's newly fabbed memory vs. an existing stock. The stock is quite massive, so optimizing existing use and enabling it to be repurposed can be meaningful.
It would make memory-poor phones more viable. Like why can't we have a 512MB, or even 256MB RAM phone. Although I doubt that the software effort would be cheaper than just buying the extra RAM. It's definitely much more uncertain.