[capableweb]

Unlikely. People hailed the lack of undo (and the tape-recorder) as a feature because it makes you either commit to your mistakes, or having to re-record. Not for me, but that's what I've heard people say about it.

And also, "undo" is mentioned nowhere, and since they add "new packaging" to their list of features, I think undo would be mentioned there if it had it. I've heard an equal amount of people praising the lack of undo, as berating the OP-1 for lacking one, so they surely would have added it if they wanted to.