The only way to access the legacy courseware is now through the Studio preview feature (and at some point, when the MFE supports a preview mode, we can then remove even that). This drops the courseware.use_legacy_frontend waffle.
Open EdX Features ----------------- This is the root package for Open edX features that extend the edX platform. The intention is that these features would ideally live in an external repository, but for now they live in edx-platform but are cleanly modularized.