“Some of you might remember us announcing the Super Duper Graphics Pack during E3 2017. Super Duper was an ambitious initiative that brought a new look to Minecraft but, unfortunately, the pack proved too technically demanding to implement as planned.
We realise this is disappointing to some of you there was a lot of enthusiasm for Super Duper from inside and outside the studio but unfortunately, we arent happy with how the pack performed across devices. For this reason, we’re stopping development on the pack, and looking into other ways for you to experience Minecraft with a new look.”
Source: N4G PC Minecraft Super Duper Graphics Pack Ceasing Development