I mean, that's the case for literally every technology that improves on what comes before. If you follow that logic you can never rewrite anything... which, granted, might be a decent idea, but not one that has anything to do with Rust.
On the other hand, "a new kid in town" is not a good reason to declare a rewrite a failure. Did it make your life better? Did it reduce bugs with a reasonable amount of effort? Maybe it was a good decision after all, given what you knew and what was available at the time.
Meanwhile, delaying a decision indefinitely just in case better options appear later is probably a road to death. Again, Rust doesn't come into the question all that strongly.
On the other hand, "a new kid in town" is not a good reason to declare a rewrite a failure. Did it make your life better? Did it reduce bugs with a reasonable amount of effort? Maybe it was a good decision after all, given what you knew and what was available at the time.
Meanwhile, delaying a decision indefinitely just in case better options appear later is probably a road to death. Again, Rust doesn't come into the question all that strongly.