People in here are so excited but I think that Apple will take this as an opportunity to make installing of custom programs even harder. The App Store might eventually be the only way to reliably install software and Homebrew could become a thing of the past.
Maybe, but I honestly kind of doubt it. The Mac specifically serves as the development platform for iOS, so you obviously need to be able to install a compiler toolchain at least for that.
But developing for iOS also requires a bunch more than just developing for iOS. Mobile apps often require servers, and Apple doesn't have a server product any more, so it's in Apple's best interest to allow stuff like Docker (which, you'll remember, they specifically demoed).
