Ah...but things like payroll/tax integrations usually require periodic changes, so folks get stuck on the upgrade treadmill even if they're happy. I somehow ended up supporting half the quickbooks users in my town and I can assure folks that most of the quickbook hate out there has been earned. :/

This project looks interesting, especially as a non-cloud offering. As for support...well that's certainly something folks can provide if there's a need.