PT doesn't get you close to what rr can do, which is reconstruct any program state at any time in the recorded execution. As Keno says in his blog post, the pr

PT doesn't get you close to what rr can do, which is reconstruct any program state at any time in the recorded execution. As Keno says in his blog post, the promise of rr is that if you have an rr recording, you are almost completely assured of having enough information to figure out the bug. That is what we see in practice, and it has big implications for developer workflow.