Shimano missed the boat by not bringing Di2 to groups below XTR so AXS seems the best option for off-road ultras now
There may have been a time long ago where they had the opportunity to do this and grow in the MTB market but there may not have been. SRAM have dominated that market and Shimano hold a small section of it, Di2 even smaller. They don't have enough sales to make the cost of developing and setting up manufacture of a new groupset that a small number of people would buy.
There may have been a time long ago where they had the opportunity to do this and grow in the MTB market but there may not have been. SRAM have dominated that market and Shimano hold a small section of it, Di2 even smaller. They don't have enough sales to make the cost of developing and setting up manufacture of a new groupset that a small number of people would buy.