There's not a lot of appetite for that, though. the 70m receiver is already one of the largest ever built, and for most use cases it's looking better to use an array of smaller ones. Which works fine for receiving but not so much for transmitting (while there are multiple sites in the world capable of receiving from voyager 2, there's only one dish which can actually transmit to it)

(I recall seeing a video on that dish, and the director seemed confident there was enough noise margin left that voyager's power would fail before they lost contact with it)