I forgot to ever post this. The LC has passed last Saturday (11 Oct). The YAML importer has since been implemented, and will be released as a part of 3.4.0 alongside the rest of the AIP-85 features. (Experimental)
Thanks all, TP Original LC thread: https://lists.apache.org/thread.html/cvskrtow7c1ksfodc315n0sl8k44bhy7 YAML format PR (parser): https://github.com/apache/airflow/pull/74084 YAML importer PR to wire the format to AIP-85: https://github.com/apache/airflow/pull/74084
