I would add that the one thing arecebo had over fast was a transmit function, a suspended cabin heavy enough to support a radar emitter. If you want to bounce radar off planets, fast wont work.
Correct! Bird lovers would hate to see those birds die, but the LiDar was the facility which allowed high-res atmospheric studies. FAST, or most other telescopes, don't have this capacity, especially with any comparable size (which allows us to amplify the signal when focused).
Truly sad.