I know there are people who will grumble and whine that DVDs are sooooooo outdated, but this is another example of why they are superior. You never have to worry someone else will take it away from you.
You bought it. You own it. Unless someone breaks into your home and takes it or your home burns down, it is yours forever. You can watch it as many times as you like whenever you want. You are not restricted to someone else's schedule. Nor do you have to worry about it breaking up because the signal got botched.
Further, DVDs don't change. No one can alter the movie with "new and improved" scenes or added "features". Han will always shoot first.
That Microsoft has told users there are no refunds is further justification why DVDs are better than streaming.