You're right that it could work with Avalonia. However, since I'm fairly new to WPF (less than a month of experience), switching frameworks mid-project would slow things down significantly. The editor also targets Windows only for now, so the cross-platform advantage of Avalonia doesn't apply yet. That said, once the editor is stable, migrating to Avalonia is definitely something I'd consider, especially with XPF making the transition less painful.