Fantastic job on the latest release! With nested categories, I feel I won’t be trapped by my ideas as they expand.
I also really appreciate your philosophy on fees; with the usable basic features and opening new features within 12 months to users, I feel more happy to contribute and don’t feel like I’m being locked in. (If you can add whole project export and export of intra-project links, that would really assure me about the lack of lock-in, but it is already pretty good.)