Indeed, a long way for kids that probably have after school stuff set up on the Island. Could have quite an impact on other Island international schools as I imagine some parents would look to relocate their children to another school if they can. Very hard to just magic up a large enough school that is empty on the Island, I'm sure if they could they would.
But ESF do have a good system for relocating schools. My daughter was at KJS the year they moved out to Hung Hom, the temporary school was refurbished to a high standard and much attention was paid to getting the children settled.