> [We] have decided to indefinitely postpone our next coordinate-changing update (GRCh39) while we evaluate new models and sequence content for the human reference assembly currently in development.

https://www.ncbi.nlm.nih.gov/grc

The complete Y chromosome from HG002 was added with v2 (after the paper was written). Probably a patched form of GRCh38 will be made using T2T sequence, but IMO it makes more sense to use T2T-CHM13 as a reference with its single origin instead of a weird chimera, at least until pan-genome graph methods mature.

We will be killing the archaic concept of a reference genome. All will some be dynamic pangenomic assemblies that grow and flex and branch as more genomes are added.