Haha I just spotted this and was coming to share it , but you beat me to the punch by 2 hours. Very interesting the changes especially downtown.

No Vancity building at Main Street - Science World, and the ramp down into Waterfront is open sky and not covered over like it is now. 

Excellent comparison vids. Hopefully such Confederation Line stations such at Hurdman will get more overhead glass/roofed in enclosures sometime down the line . . .

Some SkyTrain trivia. When the original 21 kms opened in 1985, only 1.4 kilometers was underground through the Dunsmuir tunnel, which represented 7% of the system. By 2016 with the opening of the Evergreen Line, 13kms were underground, including 2 kms of the Evergreen, 9 kms on Canada and 1 km in New Westminster, for a total of 16%. (Note, that doesn't seem to include the 600 meters between Portal Park and Waterfront which use to be outside but are now under roads and buildings). 

The 6 kms Millenium extension will bring the proportion up to 22% however, the Surrey-Langley extension will bring that back down to 19%.

https://dailyhive.com/vancouver/translink-ceo-kevin-desmond-vision