The typewriter was a great contribution to our society, but we use something better now. Same with Hubble.
Ah Yes, but the typewriter was used for many more than fifteen years until a better tool came along, yet many still use the typewriter because it performs so well yet for specific cases. To my knowledge, no Astronomers have proposed a substitute or replacement with new technology for the Hubble but they do have upgrades and want to maintain the Hubble for years longer. Hence, I'll go with the Hubble and it gives our Astronauts some place to go other than the ISS and their contribution to the Hubble's extended life will reward us with great science. For one, I still like the feel of those typewriter strikes.
There is nothing better at the moment, nor is there anything better on the drawing boards.