I don't think it has anything to do with the speed of the internet, rather you won't see large companies who paid millions for infrastructure built on Oracle or

I don't think it has anything to do with the speed of the internet, rather you won't see large companies who paid millions for infrastructure built on Oracle or SAP come off it anytime soon. The people that spend this much on money won't be sold on the wonders of Javascript, that's not how they make their purchase decisions.