Di2 is available for other models also; Alfine internal gear hub and GRX gravel series to name a few. https://bike.shimano.com/en-US/product/component/alfine-s

Di2 is available for other models also; Alfine internal gear hub and GRX gravel series to name a few. https://bike.shimano.com/en-US/product/component/alfine-s7050s705-di2/SG-S7051-11.html https://bike.shimano.com/en-US/product/component/alfine-s705... https://bike.shimano.com/en-US/product/component/grx-di2.html https://bike.shimano.com/en-US/product/component/grx-di2.htm... [edit: links and XT->GRX]