> On Jan 27, 2017, at 9:21 AM, James Berry <[email protected]> wrote:
>> It would mean for Apple (and others who'd distribute compiled frameworks) to 
>> maintain several code bases of the same framework given that they would need 
>> to maintain backward compatibility and hence wouldn't be able to use new 
>> language features, etc. It's IMHO not that much about the technical 
>> constraint of having multiple binaries within the framework bundle as much 
>> as maintaining the code in a way that would compile under all Swift versions 
>> you'd like to support.
> 
> Rather than Apple have to commit in perpetuity to ship all relevant versions 
> of the frameworks, one could imagine more of an app-thinning/install-time 
> optimization: “thinned” versions of apps would be built and signed without 
> the shared system frameworks, but with dependency information recorded. At 
> install-time, the app would be installed, and the working set of required 
> shared frameworks on the device would be updated with any needed dependent 
> frameworks. Thus only the set of frameworks required by installed apps would 
> be present on device.
> 
> This would require more app store, install-time, and perhaps dynamic linking, 
> infrastructure, but would seem to solve the problem in a way that wouldn’t 
> require ongoing development resources be applied to old versions.

i.e., you’re really just automatically factoring out frameworks that are 
common/redundant across apps in order to make install(ed) payloads smaller.

> 
> James
> 

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