It started with
"Wow, I never downloaded the database for my old site! It should still be around untouched, but I have no idea when I even made a backup of it."
Phew, the database looks intact and unchanged! As it should be, but you never know.
Oh look, there is a convenient export menu. And JSON is an option.
Operations like this make it clear how outrageously fast and powerful modern computers are. Parsing just over 6 megabytes of JSON, looping through 1810 elements, wrapping their content in the barest HTML, and writing them all plus the index to disk - using freaking Node.js - takes literally no time at all.
Moving 1811 files to trash, however, is outrageously slow by comparison, taking multiple seconds. What exactly is Macos doing there?
Anyway, great fun!