Sorry, I just don't understand Shimano's mindset on why they would offer a XTR Di2 triple and not offer a triple in any other level for Mtn and none for any Road Di2 whatsoever. They just released the XT Di2 and no triple. This is really irking me.

Shimano has proven the XTR Di2 triple works fine, so it seems there is no good excuse not to offer it as a Road triple too. My reasoning for this statement is that these days there are very few Mtn bikes, if any, offering a triple setup. Walk into any modern, non-dept store bike shop that sells decent stuff and you will find the vast majority of those Mtn bikes are 1x rings only. By "vast majority", I'm seeing like 90%, with very few multi-rings on the floors.

Looking at the Road bike market, not only do you have the pavement bikes, but also gravel grinders and the trekking people too. IMO the market for a Road triple is far larger than whatever might still exist in the Mtn format.