Imagine we have a Faster Than Light drive which costs ~$250,000 USD per drive and can propel an ISS sized craft at 1000 times the speed of light. It is reliable and has safeguards that stop it from plowing into things at high speed. How the FTL drive works is irrelevant, it could be an Alcubierre drive or powered by lalalaicanthearyouium.

Would there still be any value in building and operating (optical/radio/whatever) telescopes for (eg) locating exoplanets, studying stars, etc?
Would telescopes be gradually retired and replaced by exploration ships?