Or maybe software is just more widespread than before and it's no longer an exercise practiced by a few selected (by hard-work, luck, you name it) "experts". It is completely understandable if these new wave of developers care their time budget more than efficient hardware utilization.

This is the tendency for any craft that gains popularity over time. We can only advocate best practices by making them accessible, approachable and applicable. We can then hope the crowd listens and if they don't, that's ok, it's their loss (or not if their audience doesn't care).

A good analogy is, you don't have to build an earthquake resistant building if you are gonna use it to store some metal junk (carpenter tools, gardening tools etc). It's not a house and there is no danger even if you live on top of an active fault line.