an opportunity to simplify the file format?

I am wondering whether we couldn't take the opportunity of ROOT7 to change (a bit? radically?) the on-disk file format, especially the streamers, trees, branches and baskets.

This was also briefly mentioned in the coffee break(s) of the Annecy HEP Software Foundation workshop.

Having reimplemented a fair amount of the ROOT I/O layer in Go, I have a somewhat intimate knowledge (but still lacking!) of what goes under the wood when one does,

 

Please Help !
Thanks !

I didn't find the right solution from the internet.

References:
-https://root-forum.cern.ch/t/root7-an-opportunity-to-simplify-the-file-format/25876
-Product Marketing Video