I have wanted to hold back from answering comments that ask for proof of real work/productivity gains because everyone works differently, has different skill levels and frankly not everyone is working on world changing stuff. I really liked a comment someone made a few of these posts ago, these models are amazing! amazing! if you don't actually need them, but if you actually do need them, you are going to find yourself in a world of hurt. I cannot agree more, I (believe) I am a good software engineer, I have developed some interesting pieces of software over the decades and usually when I got passionate about a project, I could do really interesting things within weeks, sometimes months. I will say this, I am working on some really cool stuff, stuff I cannot tell you about, or else. And my velocity is for what used to take months is days and hours for what used to take weeks. I still review everything, I understand all the gotchas of distributed systems, performance, latency/throughput, C, java, SQL, data and infra costs, I get all of it so I am able to catch these mofos when they are about to stab me in the back but man! my productivity is through the roof. And I am loving it. Just so I can avoid saying I cannot tell you I am working on, I will start something that I can share soon (as soon as decades of pent up work is done, its probably less than a few months away!). Take it with a grain of salt, and know this, these things are not your friends, they WILL stab you in the back when you least expect them, cut a corner, take a short cut, so you have to be the PHB (dilbert reference!) with actual experience to catch them slacking. Good luck.