> even modern smartphones are better

That's an understatement if I've ever seen one! For web rendering single-threaded performance is what mostly matters and smartphones got crazy good single-core performance these days. The latest iPhone has faster single core than even most laptops

Yes, but parent comment definitely implied they weren't talking about people running on the latest and best out there. Even the middle-grade smartphones today are leaps and bounds better than the atom from 2010.