The DVD’s were released in 2004, two years after AOTC and a year before ROTS. So perhaps a new release will happen between Episodes 8 and 9, and this also almost fulfills the 7 year pattern.
Or something.
The recent pattern has already been somewhat broken by the 2015 digital release, so this means that the OOT will absolutely arrive in 4K in 2022. Yay!