Alex uses the analogy that libraries like lighthouses have an equally long and important history, and reveals the similarities.
As lighthouses shifted from manned to automated (Maatsuyker Island was the last in 1995), so too libraries have moved from print to electronic.
Alex finishes with "Libraries & librarians will continue to respond to their communities, subtly, continually and sometimes dramatically re-imagining their services. (true enough) We continue to be beacons of knowledge, but, unlike lighthouses, we will not become silent outposts of technology blinking hopefully out to sea."
Maybe like lighthouses libraries are solidly built to withstand all that can be thrown at it, and to see us through the passage of time.
Alex included a fact I didn't know - lighthouses are covered in the Australian Constitution 'the Commonwealth has the power to make laws for the peace, order and good government with respect to lighthouses', transferring them from the states.
I've included a number photos of the classic-style Sydney lighthouses (Alex is the NSW State Librarian).