So, we've seen in the past CIG removing something in order to add something else, because apparently the "verse" can only handle so much.
What's it getting in return?
Port Olisar was always just a temporary thing to spawn on and get your ships from, it was the first thing people saw in 2.0, its been there ever since and changed very little, they added larger extended pads for larger ships a few years ago, they also added a few shops to its interior, other than that its exactly the same as it was back in 2.0.
It does hold a special kind of place, not just to players but also CIG themselves.
However PO is too small and too old to handle the size of ships we have now, like the Hull-C that's coming in 3.20, it also needs a cargo deck for the cargo refactor, again its too small.
They have been talking about replacing it for years, they had hinted that it might go in some dramatic way, like a Vanduul attack.
Its not going permanently, it will taken out and replaced with what you see in the video in 3.20, but it will be back at a later date, they still have plans for its demise, and even after that it may not be permanently gone, it might still be there, in some form as a monument to where it began.