I'll just recognise that I'm old (and a bit grumpy): back in the day, if you didn't write minimally efficient code, it simply wouldn't run or it would be terribly slow.

Young devs have not been exposed to this and they can get away with writing inefficient code most of the time, sometimes all of the time.

And even if there is a RAM shortage, we are still in the Gigabyte age. So I don't think we will go back to cycle and byte counting.

I can't even get some devs to care if their query runs in 3s or 8ms.