This is Slashdot you're asking the question on - a crowd that is much more inclined to tax their hardware then most other places.
For myself, it's not uncommon for me to have many machines running under very high loads (often BOINC, sometimes games). And the boost in gaming performance I saw going from an AMD FX-8120 to an i5 3570K (both were equal priced at the time) was incredible. AMD's newer FX chips (which are very old at this point) don't even try to compete with the i7 - not even in AMD's marketing material. Plus the heat generated by them is much greater then what I see out of Intel chips.
I have not seen the need just yet to upgrade my desktop from the 3570K to something newer, I might when the next generation Intel comes out, but I still have several older i7 devices still in use (all first gen - a desktop, and a Dell M4500) that manage just fine as well (I'd argue the 81x0 competes with the i7 9xx series).