I like the concept of modern IGH's & gearboxes but to me it only makes sense when paired with belt drive that eliminates messy frequent chain cleaning. Derailleurs themselves are low-maintenance & with indexing/pins/ramps/shaped chain plates they run quietly & shift smoothly. Now 1x is even simpler. However I'd like to see Shimano etc popularize IGH/belt for commuter & casual bikes, the simplicity & easy maintenance could be a big selling point.