You ignore that Delphi is not just the IDE, it is the whole ecosystem of components that are developed to work with it, and these components usually come with s

You ignore that Delphi is not just the IDE, it is the whole ecosystem of components that are developed to work with it, and these components usually come with source code and are supported by developers who are incentivised to make them work. It is the tool used by developers whose customers want custom stuff done yesterday, customers whose time is 100s worth more than the trifling sums that open source developers are unable to get even their commercial users to pay for or contribute to.