We'll need to look at it a year or two from now and compare oranges to oranges; the new Ruby JIT (YJIT) is optimized for real world web apps, not for some artificial fibonacci benchmark. Shopify is using benchmarks on actual Rails apps like their store front to see the improvement (https://speed.yjit.org/).
If I had to bet I think yes Shopify is serious enough about this to make Ruby faster than PHP - who is working on PHP internals now - Zend? In the end it's mostly a question of how much resources you throw at a problem.
We'll need to look at it a year or two from now and compare oranges to oranges; the new Ruby JIT (YJIT) is optimized for real world web apps, not for some artificial fibonacci benchmark. Shopify is using benchmarks on actual Rails apps like their store front to see the improvement (https://speed.yjit.org/). If I had to bet I think yes Shopify is serious enough about this to make Ruby faster than PHP - who is working on PHP internals now - Zend? In the end it's mostly a question of how much resources you throw at a problem.