Another thing that struck me was how fast everything ran. The code prints progress information so that the user knows something is happening while the calculation is running. At least, that was necessary back in the early 2000's, on a specialised "workstation". But, on my laptop yesterday, the progress text whizzed past so fast, I couldn't read it. It's no longer necessary. I know it's obvious, but computers are *so* much faster now. 🤯