Yesterday I released Nitro Porter 3.2 which fixes & improves the CLI, as well as fixing a bug where the "PdoDB" class couldn't be found in some setups.
I also realized I wasn't getting notifications for discussions on that repo, which I've now fixed.
I currently have data for 4 pending migrations, and am awaiting data for 3 others. Going a bit slower than I'd hoped, but still moving things forward whenever I have time.