No longer relevant, wtf? It’s just that not much improvement can be done in single thread performance anymore and it is much more easier to design and market “

No longer relevant, wtf? It’s just that not much improvement can be done in single thread performance anymore and it is much more easier to design and market “n times as many cores” then “we bumped single threaded performance by 0.2%”. Mind you, almost every single application you have will ultimately depend on single threaded performance, relatively few problems can even theoretically make use of multiple cores, let alone are programmed to do so. Sure, multiple single-threaded process will like more available cores, but it is more limited on mobile devices, where few very fast cores and more slower ones are the norm.