I still use Delphi XE10 regularly, and it still is the most productive environment imho, (though object pascal is showing its age). Second choice - Swift and A

I still use Delphi XE10 regularly, and it still is the most productive environment imho, (though object pascal is showing its age). Second choice - Swift and Appcode, Swift is the most productive language I have used so far - all the static type checking but also it feels like a dynamically typed language.