GRX Di2 12 speed Speculation

It’s very interesting that Shimano are taking so long releasing GRX Di2 12 speed.  I wonder if it’s because they are developing new totally wireless tech to compete with SRAM?  ...The vulnerability of the little Di2 rear derailleur wire for gravel riding has always concerned me. This, combined with the ability to carry a spare SRAM battery makes far more sense for multi-day gravel rides / bikepacking too. …which seems to be the reason they released the mechanical GRX 12 speed version first.  Long distance reliability for gravel riding, especially off the beaten track, is more important than for road riding. 

June isn’t far away.  …if the launch is during Unbound, all the reviewers might already have their test groupsets, under embargo.

Could be... if it’s what everyone is expecting though, it’s not going to be the most exciting thing to review. Essentially “It works just like the last one, but with an extra cog, wireless shifter function you’re already familiar with from the road groups and it will handle 36T rear."

Some  key parts -- thinking here of cranks -- were already rolled out with the mechanical version. It would be great it they brought out a lighter 11/36 cassette.