I'm curious as to why they've all-of-a-sudden decided to release these on hard media. They aren't that recent. Not objecting, but it's a bit strange to me.
Contracts and release restrictions have finally expired, which is part of it. People are also pushing a lot harder for home copies of media (be them owned digital copies or physical media) and Producers are finally able to get manufacturing going to meet the demand.
"Life is already so dark. If you have got the talent to make it brighter and bring people hope & joy, why would you withhold that?"