In the initial RfC, there was an idea to allow extensions to have custom processors, but that never panned out due to lack of implementation, and lack of need. To support this theoretical functionality, we had to initialize the autoloader early, during read time. But since we no longer need to support that, we should treat autoloading like everything else, and move it back to the normal global extraction.

When doing this, we need to carefully test that the installer still works.