Interesting - for iOS this was always the case, ostensibly to prevent (or at least make harder) execution of things that aren't vetted through the app store or sandboxed in the browser. But this sort of supply chain control doesn't exist for macOS devices, so I guess they are simply reducing the support pain of all these moving parts and making them the developers problem? Perhaps instead they'll concentrate on supporting a decent package manager.. with an open ecosystem like Nuget or PsGallery, or one of the mainline Linux distros (Debian fan here)...
Full disclosure: never owned or operated a Mac since the Classic back in '92 that was on my desk when I got my first job drawing flow diagrams for speech systems.
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