The advantage of owning the DVDs over streaming is the extra content. On this box set it includes:

Extra Features:

Disc 1

• Spacelift: Transporting Trek Into the 21st Century
• Starfleet Access Episode: Where No Man Has Gone Before
• Preview Trailers

Disc 2

• Preview Trailers
• Easter Egg

Disc 3

• Reflections on Spock
• Starfleet Access Episode: The Menagerie Parts 1 and 2
• Preview Trailers

Disc 4

• Life Beyond Trek: William Shatner
• Starfleet Access Episode: Balance of Terror
• Preview Trailers

Disc 5

• To Boldly Go…Season One
• The Birth of a Timeless Legacy
• Preview Trailers
• Easter Egg

Disc 6

• Sci-Fi Visionaries
• Interactive Enterprise Inspection
• Starfleet Access Episode: Space Seed Preview
• Trailers

Disc 7

• Billy Blackbburn’s Treasure Chest: Rare Home Movies and Special Memories
• Kiss ‘N’ Tell: Romance on the 23rd Century
• Starfleet Access Episode: Errand of Mercy
• Preview Trailers
• BD-Live Portal