Comment by thisislife2

But, as the article points out, developers do pay for the tools indirectly - "First-party IDEs like Xcode and Android Studio, popular integration frameworks, and essential dev tools are all given away at no (direct) cost. The platform vendors monetize through developer program fees, app store commissions, and cloud services. Framework providers typically monetize through complementary services."

And note that the article points out two other hurdles / drawbacks to adoption - their product required a subscription and developers are unwilling to commit to product from a small company that they fear may go under.