- use baseline feature release and incremental feature release
rather than major/minor feature release
- introduce a new "feature_complete" flag on sys.version_info
to allow the branch state to be inspected at runtime
- impose a runtime feature detection requirement on all features
added in incremental feature releases
Alternative to PEP 596 that aims to reduce feature delivery latency
by giving ourselves access to a new, less disruptive, feature
delivery vehicle, rather than by increasing the frequency with
which we deploy our existing disruptive feature delivery vehicle.