As is the challenge with a lot of Disney's offerings, JuniorExec A approves a great "temporary" offering, meant to last only a couple of years. JuniorExec A leaves before the end of that period. JuniorExec B comes in, realizes this item's demolition/replacement costs vs maintenance costs ROI would be negative for their anticipated tenure, so temporary item stays. Rinse and repeat, until this temporary item becomes ingrained in the nostalgia of WDW. Finally, maintenance costs are so high, the ROI flips positive during JuniorExec X's tenure, and the item comes down. Much gnashing teeth in the Disney community ensues.