Yup, this was not flip-flopping, it was willingness to be open to options, even if it means going back on a decision branch made earlier in the process.

For the Ladybird project, now is the best time to be making a big decision like this, and it's commendable that the project lead was honest to recognize when an earlier attempt was not working, to be able to re-think and come to a better decision. I'm no fan of Rust, but for this project I think most of us would agree it's a better language than Swift for their purpose.