100% agree. I never experienced this mythical speed of development of Django or Rails, and I've been using both on/off for the last 15 years. Back then I was u

100% agree. I never experienced this mythical speed of development of Django or Rails, and I've been using both on/off for the last 15 years. Back then I was using stuff that was quite fast for development already. But as soon as you have something moderately sized the slowness of languages like Python or Ruby becomes a problem for running tests, migrations, debugging, increased server costs, downtime, overhead in things like queues. I worked in some quite large projects though, so maybe for small stuff they work, but I absolutely hate them for writing big apps. Like you said, the speed of development is IME fantastic with languages like Golang, C# or Node.js, and they don't suffer from the performance issues. Lots of companies local to me moving to Kotlin as well and my friends have only good things to say.