Nice post Bruno! I am not too sure I’d want to brag my code runs on PHP 7 though. Although it is tempting. LOL! 
What interests me the most are the large performance gains and smaller memory footprint per request. That is something almost worth bragging about. 
Would you say the performance is so good, a JIT compiler isn’t going to do much more? Or can there still be an improvement in performance with a JIT compiler? I noticed in the benchmarks PHP7 is comparable to HHVM, but what is never mention is if the HHVM JIT compiler is on or not and if not, what are the differences then? If the HHVM JIT is on, oh my. I am impressed.
Scott