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PC speed gains erased by modern software
(hackaday.com)
This is a most excellent place for technology news and articles.
I agree with most of what you said, but the problem is not everyone has brand new hardware. And it sucks that people have to buy new computers just because software devs are lazy and their program uses 10x more memory than it should.
I think the end of Moore's law will push more software efficiency since the devs won't be able to count on free hardware gains. As compilers and other dev tools get better, i think the optimizations will become more automated.