I'm reaching way back with memory here to like 35 years ago when it opened, I recall the Skywalk was lined with retail stores, cafes and take out food restaurants, all of which probably needed regular loading space for resupply and parking space for employees of those stores. That lasted all of about four years or so, I guess until the leases expired, and they slowly shut down from a lack of business. I think they far overestimated the business the Jays / CN Tower would generate (can't win the World Series every single year), not to mention people wanted to eat at the ballpark and not in a busy hallway with limited seating, and also people preferred to walk outside to/from the SkyDome, weather permitting. There was also a sharp recession in Canada in the early 90's and consumer discretionary spending dropped off a cliff until around 1995 and many downtown office workers were laid off, so it never matured into the retail destination as envisioned and they simply gave up on the space.